Appendix D Special-Status Species Considered - Contra Costa County
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Appendix D Special-Status Species Considered
Appendix D: Special-Status Species Considered
TABLE D-1
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
Species Listed or Proposed for Listing
Plants
Pallid manzanita FT/CE/1B.1 Broadleafed upland forest, Absent. Suitable habitat not found onsite. Project
Arctostaphylos pallida closed-cone coniferous forest, area is outside species’ known distribution. Not
chaparral, cismontane observed during 2007, 2008, or 2020 surveys.
woodland, coastal scrub.
Requires fire for reproduction.
185-465 m.
Blooms February – March
Tiburon paintbrush FE/CT/1B.2 Open serpentine grassland Absent. Suitable habitat not found onsite. No
Castilleja affinis var. slopes. 40-430m. occurrences documented within 10 miles of the Project
neglecta Blooms April – June site.
soft bird’s-beak FE/CR/1B.2 Occurs in coastal salt marsh, Moderate. Suitable habitat found within the marshes of
Chloropyron molle marshes, and swamps. Blooms the Project site. Nearest occurrence documented 2 miles
ssp. molle July – November northeast of the Project site in Hastings Slough among
salt marsh vegetation. Typically occurs within more
extensive saltmarsh communities than present within the
Project study area.
Suisun thistle FE/--/1B.1 Restricted to the upper reaches Low. Marginally suitable habitat is found within upper
Cirsium hydrophilum of tidal marsh. 0 – 20m. Blooms margins of the brackish marsh within the Project site.
var. hydrophilum July – September Only known occurrences are documented on Grizzly
Island on the north side of Suisun Bay and more than 10
miles from the Project site.
Mt. Diablo bird’s-beak --/CR/1B.1 Occurs in chaparral. 600-800m. Absent. Suitable habitat not found in the Project study
Cordylanthus Blooms July – August area which is outside of the understood species’ range.
nidularius
Contra Costa wallflower FE/CE/1B.1 Coastal strand and inland Absent. Suitable habitat not found in the Project study
Erysimum capitatum dunes; known only to Antioch area which is outside of the understood species’ range.
var. angustatum Dunes. 3 – 20m.
Blooms March - July
Santa Cruz tarplant FT/CE/1B.1 Coastal prairie, valley and Absent. Project study area is outside of the understood
Holocarpha foothill grassland. Found on species’ range. Occurrences within 10 miles were
macradenia light, sandy soil or sandy clay; reintroduced to Lower Sather Canyon and thought to be
often with non-natives. 10-260 extirpated.
m.
Blooms June – October
Contra Costa goldfields --/CE/1B.1 Occurs in cismontane Low. Marginally suitable habitat found within grassland
Lasthenia conjugens woodland, playas, valley and and alkali meadow of the Project site. Nearest extant
foothill grassland, vernal pools. occurrence is located 9 miles west of the Project site
4-180m. near the headwaters of Rodeo Creek.
Blooms March – June
Mason’s lilaeopsis --/CR/1B.1 Occurs in freshwater and Moderate. Suitable habitat is found within the Project
Lilaeopsis masonii brackish marshes and swamps, site. Species is locally common to Suisun Bay though
riparian scrub. 0-10m. occurrences documented closer to Bay margins than
Blooms April – November the Project site among more extensive brackish marsh
communities.
Antioch Dunes evening- FE/CE/1B.1 Occurs in inland dunes. 0 – 30m. Absent. Suitable habitat not found in the Project study
primrose Blooms March – September area.
Oenothera deltoides
ssp. howellii
Bayview Estates Residential Project ADEIR D-1 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
rock sanicle --/CR/1B.2 Occurs in rocky, scree, or talus Absent. Suitable habitat not found in the Project study
Sanicula saxatilis substrate among broad-leafed area. Regional occurrences are concentrated around
upland forest, chaparral, valley, Mt. Diablo.
and foothill grassland. 620 –
1175m.
Blooms April – May
Keck’s checkerbloom FE/--/1B.1 Valley grassland and foothill Absent. Suitable habitat not found in the Project study
Sidalcea keckii woodland; affinity to serpentine area which is outside of understood species’ range.
soil. 75 – 650m.
Blooms April – May
Two-fork clover FE/--/1B.1 Valley grassland and wetland- Low. Suitable habitat is found within the Project site
Trifolium amoenum riparian areas. Usually occurs in though Project site is outside species’ known
wetlands, but occasionally not distribution. No occurrences documented within 10
wetlands. 5 – 415m. Blooms miles of the Project site.
April – June
Invertebrates
Conservancy fairy FE/--/-- Occurs in vernal pools that are Absent. No potentially suitable habitat is found within
shrimp relatively large and turbid, at the Project site. Species’ range does not include
Branchinecta sites that are low in alkalinity. project site. No occurrences documented within 10
conservatio miles of the Project site.
Vernal pool fairy shrimp FT/--/-- Brackish water habitats; shallow Absent. No potentially suitable habitat is found within
Branchinecta lynchi lagoons and lower stream the site. No occurrences documented within 10 miles
reaches; still but not stagnant of the Project site.
water with high oxygen levels.
San Bruno elfin butterfly FE/--/-- Coastal scrub and bunchgrass Absent. Project study area is located outside of
Callophrys mossii grassland habitats on the San species’ understood range.
bayensis Francisco penninsula, with
larval foodplant, broadleaf
stonecrop (Sedum
spathulifolium); adults nectar on
bladder parsnip (Lomatium
utriculatum), common yarrow
(Achillea millefolium), coast rock
cress (Arabis blepharophylla),
San Francisco wallflower
(Erysimum franciscanum),
California buttercup
(Ranunculus californicus), and
wood strawberry (Fragaria
vesca). Known populations are
restricted o San Mateo County.
Valley elderberry CT/--/-- Found on or close to its host Absent. Host plant absent during 2007, 2008, and
longhorn beetle plant, red or blue elderberry 2020 botanical surveys and not observed during 2017
Desmocerus (Sambucus species), along reconnaissance survey.
californicus rivers and streams.
dimorphus
Bayview Estates Residential Project ADEIR D-2 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
Delta green ground CT/--/-- Found along the margins of Absent. No potentially suitable habitat for this
beetle vernal pools within 1.5 meters species occurs within the Project site. The study
Elaphrus viridis of the water. Specifically, the area is located outside of species’ understood range.
microhabitat seems to consist of
areas where the sandy mud
substrate slopes gently into the
water, and where there is very
low-growing vegetation
providing 25-100% cover.
Understood range is restricted
to the greater Jepson Prairie
area in south-central Solano
County, California.
Vernal pool tadpole FE/--/-- Occur in a wide variety of Absent. No potentially suitable habitat is found
shrimp seasonal habitats, including within the Project site. No occurrences
Lepidurus packardi vernal pools, clay flats, alkaline documented within 10 miles of the Project site.
pools, ephemeral stock tanks,
roadside ditches, and road ruts.
Majority of populations occur in
the Sacramento Valley.
Callippe silverspot FE/--/-- Found in native grasslands with Absent. Host plant absent in 2007 and 2008
butterfly California golden violet (Viola botanical surveys.
Speyeria callippe pedunculata) as larval food
callippe plant.
California freshwater FE/CE/-- Occur in small, perennial Absent. Suitable habitat not present onsite. Project
shrimp coastal streams. Found only in site is located outside of the understood species’
Syncaris pacifica low-elevation less than 116 m range.
(less than 380 feet) and low-
gradient (generally less than 1
percent) streams.
Fish
Steelhead - central FT/--/-- Requires cold, freshwater Low. Suitable habitat not found onsite. While a
California coast DPS streams with suitable gravel for remnant population still utilizes the Walnut Creek
Oncorhynchus mykiss spawning. Rears in rivers and watershed, there is little record of steelhead presence
tributaries to the San Francisco within Pacheco Creek and its tributaries.
Bay.
Longfin smelt FC/CT, CSC Found throughout the Low. Known to occupy Suisun Bay and adjoining tidal
Spirinchus /-- nearshore coastal waters and slough habitat. Unlikely to occur within tributary to
thaleichthys open waters of San Francisco Pacheco Creek due to a lack of suitable habitat.
Bay-Delta including the river
channels and sloughs of the
Delta.
Delta Smelt FT/CE/-- Brackish-water channels and Absent. Exceedingly rare within the Delta and no
Hypomesus sloughs of the Sacramento – suitable habitat found onsite.
transpacificus San Joaquin Delta.
Amphibians
California red-legged FT/CSC/-- Lowlands and foothills in or Moderate. Freshwater marsh and ponded perennial
frog near permanent sources of water of the Project site provide potential aquatic
Rana draytonii deep water with dense, shrubby habitat for this species and adjacent grasslands
or emergent riparian vegetation. provide upland refugia; however, species has not been
Requires 11-20 weeks of observed on or near the site. The nearest occurrence
permanent water for larval of California red-legged frog is documented in Briones
development. Must have access Regional Park, 5 miles south of the Project site, in two
to aestivation habitat. freshwater ponds surrounded by grazed annual
grassland.
Bayview Estates Residential Project ADEIR D-3 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
California tiger FT/CT,WL/-- Vernal or temporary pools and Low. The site does not provide suitable breeding
salamander ponds in annual grasslands, or habitat. Two occurrence records within 5 miles are
Ambystoma open stages of woodlands. from the 1920s and considered extirpated and
californiense Adults use subterranean possibly extirpated due to habitat fragmentation and
mammal burrows for refuge. urbanization of the region.
Reptiles
Alameda whipsnake FT/CT/-- Restricted to valley-foothill Absent. The site does not provide suitable for this
Masticophis lateralis hardwood habitat of the coast species. Several occurrences documented within
euryxanthus ranges between Monterey and quadrangles located west and south of the Project
north San Francisco Bay. site (within 5 miles).
Inhabits south-facing slopes
and ravines where shrubs form
a vegetative mosaic with oak
trees and grasses.
giant garter snake FT/CT/-- Primarily marshes and sloughs, Absent. Marginally suitable habitat is present in the
Thamnophis gigas sometimes low-gradient freshwater marshes of the Project site; however,
streams, ponds, and small study area is well outside species’ known distribution.
lakes, with cattails, bulrushes,
willows, or other emergent or
water-edge vegetation usually
present and used for basking
and cover.
Birds
tricolored blackbird --/CCE, CSC/- Colonial nester in wetland areas Moderate. Suitable habitat for nesting is present
Agelaius tricolor - of emergent vegetation; within the marshes of the project study area.
requires associated open water; Nearest occurrence is 1 mile northwest of the
most numerous in Central project site at the Mountain View Sanitation District
Valley. though is considered extirpated.
cackling goose DL/*/-- Lakes and island prairies. Low (no potential to nest). Marginally suitable
(=Aleutian Canada (wintering) wintering habitat is found in grassland near water
goose) within the Project site though these areas are not of
Branta hutchinsii sufficient size to support a migrating population for
leucopareia long. Species does not nest in the region.
Swainson’s hawk --/CT/-- Prairie, grassland, agricultural Low (unlikely to nest). Marginally suitable foraging
Buteo swainsoni areas. Nest in trees near and nesting habitat is found within the Project study
agricultural fields or stands of area. Species range understood to be north of the
trees along streams. Project site in less urbanized areas and east of the
Project site throughout the Central Valley. Could occur
in the study area on a transient basis.
bald eagle DL/CE, CFP/- Ocean shores, lakes, rivers. Low (unlikely to nest). Could occur over the project
Haliaeetus - Nests in large old growth trees, study area in flight and on a transient basis through
leucocephalus typically within 1 mile of water. the project site does not provide suitable nesting or
foraging habitat for this species.
California black rail BCC/CT, Inhabits freshwater marshes, Moderate (unlikely to nest). Limited suitable habitat
Laterallus jamaicensis CFP/-- wet meadows and shallow is present within the marshes of the project site.
coturniculus margins of saltwater marshes Generally more affiliated with coastal salt marshes.
bordering larger bays. Needs Nearest occurrences are documented 1 mile north of
water depths of about 1 inch the project site within brackish marshes bordering
that does not fluctuate during Carquinez Strait and in brackish marsh vegetation
the year and dense vegetation
for nesting habitat.
Bayview Estates Residential Project ADEIR D-4 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
Ridgway’s rail FE/CE, CFP/- Salt-water and brackish Low (unlikely to nest). Limited suitable habitat is
(=California clapper) - marshes traversed by tidal present within the brackish marsh of the Project site. A
Rallus longirostris sloughs in the vicinity of San small, widely distributed population known to occur in
obsoletus Francisco Bay. Associated with Suisun Marsh and several occurrences are
abundant growths of documented within 0.5 miles of the project site within
pickleweed, but feeds away the coastal salt marshes along the south border of
from cover on invertebrates Suisun Bay.
from mud-bottomed sloughs.
California least tern FE/CE, CFP/- Nests along the coast from San Low (unlikely to nest). May occur over the project
Sternula antillarum - Francisco Bay south to northern area in flight on a transient basis. No nesting colonies
browni Baja California. Colonial documented within 5 miles of the project site.
breeder on bare or sparsely
vegetated, flat substrates: sand
beaches, alkali flats, landfills, or
paved areas.
Mammals
salt-marsh harvest FE/CE, CFP/- Only in the saline emergent Low-Moderate. Limited suitable habitat is present
mouse - wetlands of San Francisco Bay within the brackish marsh of the project site. Several
Reithrodontomys estuary and its tributaries. occurrences documented 1 mile north of the project
raviventris Found primarily in pickleweed site are located in brackish water marshes bordering
(Salicornia spp.). Does not Carquinez Strait. Unlikely this species would travel to
burrow, builds loosely organized brackish marsh habitat within the Project site from
nests. Requires higher areas for more abundant and continuous habitat on the south
flood escape. border of Suisun Bay.
San Joaquin kit fox FE/CT/-- Undeveloped grasslands and Low. Project study area is located outside of the
Vulpes macrotis agricultural land. species understood range.
mutica
Other Special-Status Species
Plants
bent-flowered --/--/1B.2 Cismontane woodland, valley Low. Marginally suitable habitat found within woodland
fiddleneck and foothill grassland. 50-500 of the Hill though not observed during appropriately-
Amsinckia lunaris m. timed 2007 rare plant survey. Single occurrence within
Blooms March – June 5 miles is located in Briones Regional Park, 5 miles
southwest of the Project site.
California androsace --/--/4.2 Chaparral, foothill woodland, Low. Marginally suitable habitat found within
Androsace elongata pinyon and juniper woodland, woodland and grassland of the Hill though not
ssp. acuta northern coastal scrub, observed during appropriately timed 2007 rare plant
meadows and seeps, valley and survey.
foothill grassland, and coastal
sage scrub. Often found on
slopes. 50 – 2120m.
Blooms March – June
slender sliver moss --/--/4.2 Occurs in broadleafed upland Absent. Suitable habitat is not found in the Project
Anomobryum forest, lower montane study area.
julaceum coniferous forest and North
Coast coniferous forest. 100-
1000 m.
coast rockress --/--/4.3 Rocky areas in broadleafed Absent. Suitable habitat is not found in the Project
Arabis upland forest, coastal bluff study area. No occurrences documented within 5 miles
blepharophylla scrub, coastal prairie, coastal of the Project site.
scrub. 3 – 1100m. Blooms
February – May
Mt. Diablo manzanita --/--/1B.3 Occurs in chaparral (sandstone) Absent. Suitable habitat not found onsite. Project study
Arctostaphylos and cismontane woodland. 135- area is outside species’ known distribution. Not
auriculata 650 m. observed during 2007 and 2008 rare plant surveys.
Blooms January – March
Bayview Estates Residential Project ADEIR D-5 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
Contra Costa manzanita --/--/1B.2 Occurs in chaparral (rocky). Absent. Suitable habitat not found in the Project study
Arctostaphylos 430-1100 m. area. Not observed during 2007 and 2008 rare plant
manzanita ssp. Blooms January – March surveys.
laevigata
alkali milk-vetch --/--/1B.2 Alkali playa and flats, valley, Low. Marginally suitable habitat is found within the
Astragalus tener var. annual, and foothill grassland, alkali meadow community of the Project site.
tener vernal pools, low ground, and Species was absent during appropriately timed
flooded lands. 1-170 m. rare plant surveys conducted in 2008. No
Blooms March – June documented occurrences within 10 miles of the
Project site.
heartscale --/--/1B.2 Occurs in chenopod scrub, Absent. Suitable habitat not found in the Project study
Atriplex cordulata var. meadows and seeps, valley and area. No occurrences documented within 5 miles of the
cordulata foothill grassland (sandy). Project site.
0-560 m. Blooms April –
October
crownscale --/--/4.2 Occurs in chenopod scrub, Low. Marginally suitable habitat found within
Atriplex coronata var. valley and foothill grassland, woodland and grassland of the hill and within the
coronata vernal pools.1-590 m. alkali meadow community though not observed
Blooms March – October during appropriately- timed 2007 rare plant survey.
brittlescale --/--/1B.2 Occurs in chenopod scrub, Low. Marginally suitable habitat not found in the Project
Atriplex depressa meadows and seeps, playas, study area. No occurrences documented within 5 miles
valley and foothill grassland, of the Project site.
and vernal pools. 1-320 m.
Blooms April – October
vernal pool smallscale --/--/1B.2 Occurs in vernal pools Absent. Suitable habitat not found in the Project study
Atriplex persistens (alkaline). 10-115 m. area. No occurrences documented within 5 miles of the
Blooms June – October Project site.
big-scale balsamroot --/--/1B.2 Occurs in chaparral, Absent. Suitable habitat not found in the Project study
Balsamorhiza cismontane woodland, valley area. No occurrences documented within 5 miles of the
macrolepis and foothill grassland. 90-1555 Project site.
m.
Blooms March – June
big tarplant --/--/1B.1 Occurs in valley and foothill Low. Suitable habitat found within woodland and
Blepharizonia grassland. 30-505 m. Blooms grassland of the hill though not observed during
plumosa July – October appropriately timed 2007 rare plant survey. Nearest
occurrence documented 5 miles northwest of the
Project site in Benicia is historical and considered
possibly extirpated.
Brewer’s calandrinia --/--/4.2 Chaparral, northern coastal Absent. Suitable habitat not found in the Project study
Calandrinia breweri scrub and coastal sage scrub in area. No occurrences documented within 5 miles of the
disturbed habitat. Project site.
10 – 1220m. Blooms March –
June
round-leaved filaree --/--/1B.1 Cismontane woodland, valley Low. Marginally suitable habitat found within
California macrophylla and foothill grassland. Clay woodland and grassland of the hill though not
soils. 15-1,200 m. observed during appropriately timed 2007 rare plant
Blooms March – May survey.
Mt. Diablo fairy lantern --/--/1B.2 Occurs in chaparral, Low. Marginally suitable habitat found within
Calochortus cismontane woodland, riparian woodland and grassland of the hill though not
pulchellus woodland, valley and foothill observed during appropriately timed 2007 rare plant
grassland. 30-840 m. Blooms survey.
April – June
Bayview Estates Residential Project ADEIR D-6 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
Oakland star-tulip --/--/4.2 Chaparral, valley grassland, Low. Marginally suitable habitat found within
Calochortus yellow pine forest and mixed woodland and grassland of the hill though not
umbellatus evergreen forest. Has an affinity observed during appropriately timed 2007 rare plant
to serpentine soils. 100–700m. survey.
Blooms March – May
chaparral harebell --/--/1B.2 Occurs in chaparral in rocky, Absent. Suitable habitat is not found in the Project
Campanula exigua usually serpentinite substrate. study area. No occurrences documented within 5 miles
275–1250 m. of the Project site.
Blooms May – June
johnny-nip --/--/4.2 Coastal bluff scrub, coastal Low. Marginally suitable habitat is found in the Project
Castilleja ambigua prairie, coastal scrub, marshes study area. Occurrences within 5 miles are historical
var. ambigua and swamps, valley and foothill and located in the Martinez area.
grassland, and margins of
vernal pools. 0–435m. Blooms
March – August
holly-leafed ceanothus --/--/1B.2 Chaparral and cismontane Absent. Suitable habitat not found in the Project study
Ceanothus woodland. 120-640 m. Blooms area. No occurrences documented within 5 miles of the
purpureus February – June Project site.
Congdon’s tarplant --/--/1B.1 Valley and foothill Moderate. Suitable habitat is found within the alkali
Centromadia parryi grasslands/alkaline habitats, meadow community and grasslands of the Project
ssp. cogdonii low water tolerance. 0–260m. site near the brackish marsh associated with
Pacheco Creek. Species documented on the property
Blooms May – October,
uncommon in November in 2005 but was not found during appropriately timed
rare plant surveys conducted in 2007.
papoose tarplant --/--/1B.2 Chaparral, coastal prairie, Low. Marginally suitable habitat is found in the Project
Centromadia parryi meadows and seeps, marshes study area. No occurrences documented within 5 miles
ssp. parryi and swamps (coastal salt), of the Project site.
valley and foothill grassland
(vernally mesic). 0-420 m.
Blooms May – November
Parry’s rough tarplant --/--/4.2 Valley and foothill grassland, Low. Marginally suitable habitat is found in the Project
Centromadia parri vernal pools. 0-100 m. Blooms study area. No occurrences documented within 5 miles
ssp. rudis May – October of the Project site.
hispid salty bird’s-beak --/--/1B.1 Meadows and seeps, playas, Low. Marginally suitable habitat is found in the Project
Chloropyron molle valley and foothill grassland. 1 - study area. No occurrences documented within 5 miles
ssp. hispidum 155 m. of the Project site.
Blooms June – September
Bolander’s water- --/--/2B.1 Marshes and swamps, coastal, Moderate. Suitable habitat is found in the marshes in
hemlock fresh or brackish water. 0-200 the Project site. Occurrences documented within 5
Cicuta maculata var. m. miles of the Project site are historical.
bolanderi Blooms July – September
Franciscan thistle --/--/1B.2 Mixed evergreen forest, Low. Marginally suitable habitat is found in the Project
Cirsium andrewsii northern coastal scrub, coastal study area. No occurrences documented within 5 miles
prairie, and wetland, riparian of the Project site.
areas along the coast. Affinity to
serpentine soil. 13 – 1950 m.
Blooms March – July
serpentine collomia --/--/4.3 Chaparral, cismontane Absent. Suitable habitat not found in the Project study
Collomia diversifolia woodland. 200-600 m. area.
Blooms May – June
Bayview Estates Residential Project ADEIR D-7 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
Hospital Canyon --/--/1B.2 Chaparral (openings), Absent. Marginally suitable habitat found within
larkspur cismontane woodland (mesic), woodland of the hill though not observed during
Delphinium coastal scrub. 195-1095 m. appropriately timed 2007 rare plant survey. Site is
californicum ssp. below known elevation range.
Blooms April – June
interius
western leatherwood --/--/1B.2 Broadleaf upland forest, Absent. Suitable habitat not found in the Project study
Dirca occidentalis chaparral, closed-cone area. Single occurrence within 5 miles is located on
coniferous forest, cismontane the north side of Carquinez Straight.
woodland, north coast coniferous
forest, riparian for and woodland.
on brushy slopes, mesic sites;
mostly in mixed evergreen and
foothill woodland communities.
30-550 m.
Blooms January – March (April)
dwarf downingia --/--/2B.2 Valley and foothill grassland Low. Marginally suitable habitat is found within the
Downingia pusilla (mesic), vernal pools. 1-445 m. grasslands of the Project site. No occurrences
Blooms March – May documented within 5 miles of the Project site.
small spikerush --/--/4.3 Marshes and swamps. 1-3020 Moderate. Suitable habitat found within marshes of
Eleocharis parvula m. the Project study area though not observed during
Blooms June – August appropriately timed 2007 rare plant survey.\
Lime Ridge Eriastrum --/--/1B.2 Chaparral (openings or edges). Absent. Suitable habitat not found in the Project study
Eriastrum ertterae 200-290 m. area.
Blooms June – July
Mt. Diablo buckwheat --/--/1B.1 Chaparral, coastal scrub, valley Low. Marginally suitable habitat found within
Eriogonum truncatum and foothill grassland. 3-350 m. woodland and grassland of the hill though not
Blooms April – September observed during appropriately timed 2007 rare plant
(November – December) survey.
Jepson’s wooly --/--/4.3 Chaparral, cismontane Absent. Suitable habitat not found in the Project study
sunflower woodland, coastal scrub. 200- area.
Eriophyllum jepsonii 1025 m. Blooms April – June
Jepson’s coyote thistle --/--/1B.2 Valley and foothill grasslands Low. Marginally suitable habitat found within
Eryngium jepsonii and vernal pools. 6 – 110m. grassland of the Project site. Single occurrence within
Blooms April – August 5 miles is located 4 miles east of the Project site on
the Carquinez Loop trail southwest of Martinez.
San Joaquin spearscale --/--/1B.2 Chenopod scrub, meadows and Low. Marginally suitable habitat found within
Extriplex joaquinana seeps, playas, valley and grassland of the Project site. Nearest occurrence
foothill grassland. 1-835 m. documented within the Golden Eagle refinery in
Blooms April – October grassland above brackish marsh habitat. Not
observed during appropriately timed 2007 rare plant
survey.
minute pocket moss --/--/1B.2 North coast coniferous forest Absent. Suitable habitat not found in the Project study
Fissidens with damp coastal soils. 10 – area.
pauperculus 1024m. Year-round
Fragrant fritillary --/--/1B.2 Coastal scrub, valley and Moderate. Suitable habitat is found within grasslands
Fritillaria liliacea foothill grassland, coastal of the Project site. Species was absent during
prairie. Often on serpentine; appropriately timed rare plant surveys conducted in
usually on clay soils, in 2008. Two occurrences are documented 10 miles
grassland. 3-410 m. southeast of the Project site on Shell Ridge within
Blooms February – April Walnut Creek Open Space.
Toren’s grimmia --/--/1B.3 Chaparral, cismontane Absent. Suitable habitat not found in the Project study
Grimmia torenii woodland and lower montane area.
coniferous forest in openings of
rocky areas, boulders, and on
rock walls.
Bayview Estates Residential Project ADEIR D-8 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
Diablo helianthella --/--/1B.2 Broadleaved upland forest, Low. Marginally suitable habitat found within
Helianthella castanea chaparral, cismontane woodland and grassland of the hill though not
woodland, coastal scrub, observed during appropriately timed 2007 rare plant
riparian woodland, valley and survey.
foothill grassland. Usually in
chaparral/oak woodland
interface in rocky, azonal soils.
Often in partial shade. 25-1,150
m. Blooms March – June
Brewer’s western flax --/--/1B.2 Chaparral, cismontane Absent. Suitable habitat not found in the Project study
Hesperolinon breweri woodland, valley and foothill area.
grassland. 30-945 m.
Blooms May – July
coast iris --/--/4.2 Coastal prairie, lower montane Low. Marginally suitable habitat found within woodland
Iris longipetala coniferous forest, meadows and and grassland of the study area. Not documented within
seeps, mesic sites. 5 miles of the Project site.
5 – 430m. Blooms March – May
Carquinez goldenbush --/--/1B.1 Valley and foothill grassland Low. Marginally suitable habitat found within
Isocoma arguta (alkaline). 1-20 m. woodland and grassland of the hill though not
Blooms August – December observed during appropriately timed 2007 rare plant
survey.
southern California --/--/4.2 Chaparral, cismontane Absent. Suitable habitat not found in the Project study
black walnut woodland, coastal scrub, area. Not observed during 2007 and 2008 rare plant
Juglans californica riparian woodland. 50-900 m. surveys.
Blooms March – August
Ferris’ goldfields --/--/4.2 Vernal pools (alkaline, clay). 20- Low. Marginally suitable habitat found within
Lasthenia ferrisiae 700 m. Blooms February – May alkali meadow community though not observed
during appropriately timed 2007 rare plant
survey.
delta tule pea --/--/1B.2 Freshwater and brackish Moderate. Suitable habitat found within freshwater
Lathyrus jepsonii var. marshes. 0-530 m. marsh of the Project site though not observed during
jepsonii appropriately timed 2007 rare plant survey. Nearest
Blooms May – July
occurrence documented within 1 mile of the Project
site at the Waterbird Regional Preserve.
legenere ---/--/1B.1 Vernal pools. Found in beds of Absent. Suitable habitat not found in the Project study
Legenere limosa vernal pools. 1-880m. Blooms area. No occurrences documented within 5 miles of
April – June the Project site.
wooly-headed lessingia --/--/3 Valley grassland, yellow pine Low. Marginally suitable habitat found in the Project
Lessingia hololeuca forest and northern coastal site. No occurrences documented within 5 miles of the
scrub. Has an affinity to Project site.
serpentine soils. 15 – 305m.
Blooms June – October
Delta mudwort --/--/2B.1 Marshes and swamps Moderate. Suitable habitat found in the Project site.
Limosella australis (freshwater or brackish), and Occurrences within 5 miles of the Project site
riparian scrub. 0-3 m. concentrated on the margins of Suisun Bay.
Blooms May – July (August –
September)
showy golden madia --/--/1B.1 Cismontane woodland and Low. Marginally suitable habitat found in the Project
Madia radiata valley and foothill grassland. 25- site. No occurrences documented within 5 miles of the
1215 m. Blooms March – May Project site.
Hall’s bush-mallow --/--/1B.2 Chaparral and coastal scrub. Absent. Suitable habitat not found in the Project study
Malacothamnus hallii 10-760 m. Blooms (April) May – area. Not observed during appropriately timed 2007 rare
September (Oct) plant survey.
Bayview Estates Residential Project ADEIR D-9 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
Oregon meconella --/--/1B.1 Coastal prairie and coastal Low. Marginally suitable habitat found within
Meconella oregana scrub. 250-620 m. Blooms grassland of the Project study area though not
March – April observed during appropriately timed 2007 rare plant
survey. Regional occurrences concentrated along the
Berkeley and Oakland hills ridgeline.
Mt. Diablo cottonweed --/--/3.2 Rocky areas within valley Absent. Suitable habitat not found in the Project
Micropus grassland, foothill woodlands study area. Not observed during appropriately timed
amphibolus and mixed evergreen forest. 2007
Has an affinity to serpentine
soils. 45 – 825m. Blooms March
– May
march microseris --/--/1B.2 Closed-cone coniferous forest, Low. Marginally suitable habitat found in the Project
Microseris paludosa cismontane woodland, coastal site. No occurrences documented within 10 miles of
scrub, and valley and foothill the Project site.
grassland. 5 – 355m.
Blooms April – June
San Antonio Hills --/--/3 Chaparral and cismontane Absent. Suitable habitat not found in the Project study
monardella woodland. 320-1000 m. Blooms area.
Monardella antonina June – August
ssp. antonina
woodland woolythreads --/--/1B.2 Mixed evergreen forest, Low. Marginally suitable habitat found in the Project
Monolopia gracilens broadleaved upland forest, site. No occurrences documented within 10 miles of
redwood forest, and chaparral, the Project site.
and valley and foothill
grasslands. Affinity to
serpentine soil. 60 – 1360m.
Blooms March – July
little mousetail --/--/3.1 Valley and foothill grassland, Absent. Suitable habitat not found in the Project site.
Myosurus minimus and vernal pools (alkaline). 20- No occurrences documented within 10 miles of the
ssp. apus 640 m. Blooms March – June Project site.
Lime Ridge Navarretia --/--/1B.1 Occurs in chaparral. 180-305 m. Absent. Suitable habitat not found in the Project study
Navarretia gowenii Blooms May – June area.
Baker’s navarretia --/--/1B.1 Cismontane woodland, lower Low. Marginally suitable habitat found in the Project
Navarretia montane coniferous forest, site. No occurrences documented within 10 miles of
leucocephala ssp. meadows and seeps, valley and the Project site.
bakeri foothill grassland, and vernal
pools. 5-1740 m. Blooms April –
July
Mt. Diablo phacelia --/--/1B.2 Rocky areas within chaparral Absent. Suitable habitat not found in the Project
Phacelia phacelioides and cismontane woodland. 500- study area. Not observed during appropriately timed
1370 m. Blooms April – May 2007
bearded popcornflower --/--/1B.1 Valley and foothill grassland Low. Marginally suitable habitat found in the Project
Plagiobothrys (mesic) and vernal pools site. No occurrences documented within 5 miles of the
hystriculus margins. 0-274 m. Project site.
Blooms April – May
Bayview Estates Residential Project ADEIR D-10 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
Marin knotweed --/--/3.1 Coastal salt or brackish marsh Low. Marginally suitable habitat is found in brackish
Polygonum and coastal wetland and marsh of the Project site though few occurrences
marinense riparian areas. 0-10 m. within 5 miles located on the north side of Suisun Bay
Blooms May – August in Benicia State Park.
California alkaline grass --/--/1B.2 Chenopod scrub, meadows and Low. Marginally suitable habitat found in the Project
Puccinellia simplex seeps, valley and foothill site. No occurrences documented within 10 miles of
grassland, and vernal pools. the Project site.
Blooms March – May
Lobb’s aquatic --/--/4.2 Valley grassland, foothill Low. Marginally suitable habitat found within
buttercup woodland, redwood forest, grassland, alkali meadow, and freshwater marsh
Ranunculus lobbii freshwater wetlands, wetland- communities though not found during appropriately
riparian areas and vernal pools. timed 2007 rare plant survey.
Occurs almost always under
natural conditions in wetlands.
12 – 810m. Blooms February –
May
chaparral ragwort --/--/2B.2 Chaparral, cismontane Low. Marginally suitable habitat found within
Senecio aphanactis woodland, and coastal scrub. woodland of the hill though not observed during
Sometimes alkaline. 15 – 800m. appropriately- timed 2007 rare plant survey.
Blooms January – April
long-styled sand- --/--/1B.2 Meadows and seeps, and Low. Marginally suitable habitat is found in freshwater
spurrey marshes and swamps. 0-255 m. marsh of the Project site. No occurrences documented
within 5 miles of the Project site.
Spergularia Blooms February – May
macrotheca var.
longistyla
most beautiful jewel --/--/1B.2 Chaparral, cismontane Absent. Suitable habitat not found in the Project study
flower woodland, and valley and area. No occurrences documented within 5 miles of
the Project site.
Streptanthus albidus foothill grassland. Affinity for
ssp. peramoenus serpentine soils. 95-1000 m.
Blooms April – September
Mt. Diablo jewelflower --/--/1B.3 Rocky areas within chaparral Absent. Suitable habitat not found in the Project
study area. Not observed during appropriately timed
Streptanthus hispidus and valley and foothill
2007
grassland. 365-1200 m.
Blooms March – June
slender-leaved --/--/2B.2 Marshes and swamps, in Low. Marginally suitable habitat is found in freshwater
pondweed shallow, clear water of lakes marsh of the Project site. No occurrences documented
Stuckenia filiformis and drainage channels. within 5 miles of the Project site.
ssp. alpina 15 – 2310m. Blooms May – July
Suisun Marsh aster --/--/1B.2 Freshwater wetlands and Low. Suitable habitat found within freshwater marsh
of the Project site though not observed during
Symphyotrichum marshes and brackish marshes.
appropriately timed 2007 rare plant survey.
lentum 0-3 m.
Blooms May – November
saline clover --/--/1B.2 Marshes and swamps, valley Low. Marginally suitable habitat is found in freshwater
Trifolium and foothill grassland, vernal marsh of the Project site. Single occurrences
depauperatum var. pools. Mesic, alkaline sites. 0- documented within 5 miles of the Project site is from
hydrophilum 300 m. Blooms April – June 1928 and lacks description.
coastal triquetrella --/--/1B.2 On soil in coastal bluff and Absent. Suitable habitat not found in the Project study
Triquetrella californica coastal scrub. 10-100 m. area.
Bayview Estates Residential Project ADEIR D-11 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
caper-fruited --/--/1B.1 Valley and foothill grassland Low. Marginally suitable habitat found within
tropidocarpum (alkaline hills). 1-455 m. Blooms woodland and grassland of the Hill though not
Tropidocarpum March – April observed during appropriately timed 2007 rare plant
capparideum survey.
oval-leaved viburnum --/--/2B.3 Chaparral, cismontane Absent. Suitable habitat not found in the Project study
Viburnum ellipticum woodland, and lower montane area.
coniferous forest. 215-1400 m.
Blooms May – June
Invertebrates
Monarch butterfly --/*/-- Winter roost sites extend along Low. Individuals may occur in the Project study area
Danaus plexippus (wintering the coast from northern during migration though no established wintering
sites) Mendocino to Baja California, ground are documented within 5 miles.
Mexico. Roosts located in wind-
protected tree groves
(eucalyptus, Monterey pine,
cypress), with nectar and water
sources nearby.
Bridges' coast range --/* Inhabits open hillsides of Moderate. Suitable habitat is found on annual
shoulderband Alameda and Contra Costa grassland of the hill within the Project site. Single
Helminthoglypta counties. Tends to colonize occurrence within 5 miles is documented 0.5 mile
nickliniana bridgesi under tall grasses and weeds. southwest of the Project site.
Fish
Sacramento perch --/CSC Historically found in the Absent. Not expected to occur in project area waters.
Archoplites sloughs, slow-moving rivers,
interruptus and lakes of the Central Valley.
Prefers warm water. Aquatic
vegetation is essential for
young. Tolerates wide range of
water conditions.
Sacramento splittail --/CSC/-- Range centers on the San Low. Primarily confined to the Delta, Suisun Bay,
Pogonichthys Francisco Estuary and Suisun Marsh and the lower Napa River.
macrolepidotus spawning occurs in flooded Marginally suitable habitat is present in Pacheco
vegetation. Creek, though occurrence is unlikely at such a
distance from Suisun Bay.
California roach --/CSC/-- Inhabit small, often intermittent Low. Historically abundant within the Walnut Creek
Lavinia symmetricus streams. Tolerate a wide range watershed. Potentially present within the Pacheco
symmetricus of temperature and dissolved Creek as roach can tolerate a wider range of habitat
oxygen levels. conditions than other native species.
Sacramento hitch --/CSC/-- Inhabit warm, lowland waters, Low. Historically abundant within the Walnut Creek
Lavinia exilicauda and clear streams. Prefer watershed. Often overlaps in distribution with
exilicauda shallow stream habitat with California roach, as they share similar habitat
smaller gravel and mud requirements, and may be present within Pacheco
substrates. Creek.
Pacific lamprey --/CSC/-- Requires cool, freshwater Low. Known to occur within the upper reaches of
Entosphenus streams with suitable gravel for Walnut Creek. This species’ status is poorly
tridentatus spawning. Rears in rivers and documented, and its relative abundance in streams is
tributaries to San Francisco unknown.
Bay.
Bayview Estates Residential Project ADEIR D-12 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
Chinook salmon – --/CSC/-- Requires cold, freshwater Low. Known to occur within lower Walnut Creek,
Fall/Late-fall ESU streams with suitable gravel for however, there is a lack of suitable habitat within the
Oncorhynchus spawning. More common in Project site.
tshawytscha Central Valley streams,
occasionally rears in tributaries
to San Francisco Bay.
Reptiles
northern California --/CSC/-- Burrows in loose soil, especially Low. Marginally suitable habitat is found on
legless lizard in semi-stabilized sand dunes exposed soils of the hill within the Project site.
Anniella pulchra and in other areas with sandy Single occurrence within 10 miles is located 9 miles
soil, including habitats southwest of the Project site in Lafayette and is
vegetated with oak or pine-oak considered possibly extirpated.
woodland, or chaparral.
Sometimes found under leaf
litter beneath trees or other
surface objects such as
driftwood and logs.
Western pond turtle --/CSC/-- Aquatic turtle of ponds, Moderate. Suitable habitat is found in the tributary to
Actinemys marmorata marshes, rivers, streams and Pacheco Creek and perennial pond of the Project site.
irrigation ditches with aquatic Documented in Pacheco Creek within 0.5 mile of the
vegetation. Needs basking sites Project site. Several other occurrences documented
and suitable (sandy banks or within 5 miles.
grassy open fields) upland
habitat for egg-laying.
coast horned lizard --/CSC/-- Occurs in valley-foothill Low. Marginally suitable habitat is found in the foothill
Phrynosoma blainvillii hardwood, conifer and riparian grassland and woodland of the Project site. Single
habitats, as well as in pine- occurrence within 10 miles is documented 9 miles
cypress, juniper and annual south of the Project site west of Zion Peak in Clayton
grassland habitats. in open chaparral habitat. Study area is on western
edge of understood species’ range.
Birds
Cooper's hawk --/CDFW Woodland, chiefly of open, Present (unlikely to nest). Present Species prefers
Accipiter cooperi WL&3503.5 interrupted or marginal type. more densely wooded habitats for nesting and
Nest sites are mainly in riparian foraging that found in the study area.
growths of deciduous trees but
also relatively common in urban
areas.
Great egret --/* Nest colonially in groves of Present (unlikely to nest). Suitable foraging habitat
Ardea alba (rookery site) trees. Rookery sites located is present in the freshwater marsh and drainage
near marshes, tide-flats, channel to Pacheco Creek. Observed in the site
irrigated pastures, and margins during 2020 surveys. No established rookeries
of rivers and lakes. documented in the study area for nesting.
great blue heron --/* Colonial nester in tall trees, cliff Present (unlikely to nest). Suitable foraging habitat
Ardea herodias (rookery site) sides, and sequestered spots is present in the freshwater marshes in the site.
on marshes. Rookery sites in Observed in the pond during 2020 surveys. No
close proximity to foraging established rookeries documented in the study area
areas: marshes, lake margins, for nesting.
tide-flats, rivers and streams,
wet meadows.
short-eared owl --/CSC Found in swamp lands, both Low (unlikely to nest). Limited suitable habitat for this
Asio flammeus fresh and salt; lowland species is found within the project study area. Nearest
meadows; irrigated alfalfa fields. occurrence documented 10 miles northeast of the
project site at Grizzly Island Wildlife Area. May occur
over the project site on a transient basis.
Bayview Estates Residential Project ADEIR D-13 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
burrowing owl --/CSC Open, dry annual or perennial Low (unlikely to nest). Marginally suitable habitat is
Athene cunicularia grasslands, deserts and present in the study area. Flat areas of annual
scrublands characterized by grasslands within the Project site have been disked
low-growing vegetation. and no ground squirrel burrows were observed in
Subterranean nester, this area. Two occurrences documented within 5
dependent upon burrowing miles of the Project site are 1.5 miles southeast at
mammals, most notably, the the Buchannan Airfield and 5 miles northeast at
California ground squirrel. Military Ocean Terminal Concord.
golden eagle --/CFP Rolling foothills, mountain Low (unlikely to nest). Marginally suitable annual
Aquila chrysaetos areas, sage-juniper flats, and grassland and foothill habitat is found in the Project
desert. Cliff-walled canyons and study area however is generally not of sufficient size to
large trees in open areas attract foraging or nesting eagles.
provide nesting habitat.
great horned owl --/--/3503.5 Moderate (potential to nest). Species is ubiquitous
Bubo virginianus throughout the region. May forage over study area
grasslands and nest in mature trees on the Hill.
Red-tailed hawk --/--/3503.5 Usually nests in large trees, Moderate (potential to nest). Species is ubiquitous
Buteo jamaicensis often in woodland or riparian throughout the region. May forage over study area
deciduous habitats. Also known grasslands and nest in mature trees on the Hill.
to nest in urban parks and
neighborhoods. Forages over
open grasslands and
scrublands.
northern harrier --/CSC/-- Coastal salt and fresh-water Moderate (potential to nest). Suitable foraging and
Circus cyaneus marsh. Nests and forages in nesting habitat is found within the study area
grasslands. Nests on ground in grasslands and marsh habitats.
shrubby vegetation, usually at
marsh edge; nest built of a large
mound of sticks in wet areas.
yellow rail --/CSC/-- Occurs in densely vegetated Low (no potential to nest). Suitable habitat is
Coturnicops marshes. Require sedge found in the marshes in the Project site.
noveboracensis marshes/meadows with moist Uncommon to the region; study area is outside of
soil or shallow standing water the species’ understood range.
for breeding.
White-tailed kite --/CFP/-- Rolling foothills and valley Moderate (potential to nest). Suitable nesting
Elanus leucurus margins with scattered oaks habitat is present in the study area. Suitable foraging
and river bottomlands or habitat is found throughout annual grassland of the
marshes next to deciduous study area.
woodland. Open grasslands,
meadows, or marshes for
foraging close to isolated,
dense-topped trees for nesting
and perching.
American peregrine DL/DL, CFP/-- Woodlands, coastal habitats, Low (unlikely to nest). Could occur over the project
falcon riparian areas, coastal and study area in flight and on a transient basis through
Falco peregrinus inland waters, human made the project site does not provide suitable nesting or
anatum structures that may be used as foraging habitat for this species.
nest or temporary perch sites.
American kestrel --/3503.5 Frequents generally open Moderate (potential to nest). Species is ubiquitous
Falco sparverius grasslands, pastures, and throughout the region. May forage over study area
fields; primarily a cavity nester grasslands and nest in mature trees on the site.
in large trees near open areas.
Bayview Estates Residential Project ADEIR D-14 ESA / 208078
Screencheck 2 Draft Environmental Impact Report May 2021Appendix D: Special-Status Species Considered
TABLE D-1 (Continued)
SPECIAL-STATUS SPECIES CONSIDERED IN EVALUATION OF THE BAYVIEW ESTATES RESIDENTIAL PROJECT
Listing
Status General Habitat /
Common Name USFWS/ Period of Identification or Potential for Species Occurrence Within
Scientific Name CDFW/Other Flowering Period Project Study Area
Saltmarsh common BCC/CSC/-- Resident of the San Francisco Low (unlikely to nest). Species generally prefers
yellowthroat Bay region, in fresh and salt dense riparian willow thickets for nesting. May occur
Geothlypis trichas water marshes. Requires thick, throughout the marsh vegetation in the study area on
sinuosa continuous cover down to water a transient basis. Several occurrences documented in
surface for foraging; tall the salt marshes along the southern border of Suisun
grasses, tule patches, willows Bay.
for nesting.
Suisun song sparrow BCC/CSC/-- Resident of salt marshes Moderate (unlikely to nest). Suitable foraging and
Melospiza melodia bordering Suisun Bay from nesting habitat is present within the marshes of the
maxillaris Martinez eastward along the project site. Nearest occurrences are documented 1
south bayshore to Pittsburg, mile north of the project site in coastal saltmarshes
and within the Suisun which border Suisun Bay.
marshlands north of the Bay.
Inhabits pickleweed marshes;
nests low in Grindelia (high
enough to escape high tides)
and in pickleweed. Will also
forage in non-tidal seasonal
wetlands, riparian areas, and
drainages.
San Pablo song BCC/CSC/-- Resident of salt marshes Low (unlikely to nest). Suitable habitat is present
sparrow bordering San Pablo Bay. within brackish marsh in the project site though the
Melospiza melodia Inhabits pickleweed marshes; project site is outside of the species known range
samuelis nests low in Grindelia bushes (salt marshes of San Pablo Bay). Nearest
(high enough to escape high occurrence is documented 10 miles northwest of the
tides) and in pickleweed. project study area at the boundary of San Pablo and
Suisun Bay. May occur on a transient basis during
Osprey --/WL/-- Habitat varies greatly and Low (unlikely to nest). Suitable nesting habitat for
Pandion haliaetus usually includes adequate this species is not present within the project study
supply of accessible fish, area. May occur over the project site while in transit to
shallow waters, open and Suisun Bay.
elevated nest sites (10-60 feet
in height), and artificial
structures such as towers.
Builds large platform stick nests
near or in open waters.
Mammals
Pallid bat --/CSC/ Deserts, grasslands, Low. Suitable roost sites not found within the project
Antrozous pallidus WBWG-H shrublands, woodlands and study area. Species may forage over freshwater marsh
forests. Most common in open, and annual grassland of the project site. Nearest
dry habitats with rocky areas for occurrences documented more than 5 miles south of
roosting. Day roots in caves, the projects site.
crevices, mines, and hollow
trees and buildings. Night roosts
can occur in more open areas,
like porches and open
buildings. Roosts must protect
bats from high temperatures.
Very sensitive to disturbance of
roosting sites.
Townsend’s big-eared --/CSC/ Inhabits caves and mines, but Moderate. Limited roost habitat is found within trees
bat WBWG-H may also use bridges, buildings, on the hill within the project site. Species may forage
Corynorhinus rock crevices and tree hollows over freshwater marsh and annual grassland of the
townsendii in coastal lowlands, cultivated project site. Nearest occurrence documented 7 miles
valleys and nearby hills south of the project site.
characterized by mixed
vegetation throughout California
below 3,300 meters. Very
sensitive to human disturbance.
Bayview Estates Residential Project ADEIR D-15 ESA / 208078
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