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Environmental Impact Statement - Sonoma Land Trust

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Table 3.5-2. Special-Status Species Occurring in or with Potential to Occur at or near the Sears Point Restoration Project Site<br />

Common Name<br />

Scientific Name<br />

INVERTEBRATES<br />

Status<br />

Federal/State/<br />

Other Geographic Distribution Habitat Requirements<br />

Potential Occurrence in<br />

Project/Study Area<br />

Vernal pool fairy shrimp<br />

Branchinecta lynchi<br />

T/–<br />

Central Valley, central and south<br />

Coast Ranges from Tehama County to<br />

Santa Barbara County. Isolated<br />

populations also in Riverside County<br />

Common in vernal pools; also found in<br />

sandstone rock outcrop pools<br />

Low. Nearest occurrence<br />

approximately 10 miles; marginal<br />

habitat present at the project site.<br />

Conservancy fairy shrimp<br />

Branchinecta conserrvatio<br />

E/-<br />

Restricted to Central Valley except<br />

one population in Ventura county.<br />

Found in large turbid pools in northern<br />

2/3 of the Central Valley; located in<br />

swales formed by old braided alluvium<br />

filled by winter/spring rains and filled<br />

into summer<br />

Low. The site is outside the<br />

species range.<br />

California freshwater shrimp<br />

Syncaris pacifica<br />

E/E<br />

Perennial freshwater streams of Marin,<br />

<strong>Sonoma</strong> and Napa counties.<br />

Lowland streams flowing southward into<br />

San Pablo Bay; away from main current<br />

often near undercut banks, exposed roots<br />

and vegetation hanging into water.<br />

Low. Riparian cover is currently<br />

severely limited along ephemeral<br />

streams draining east side of<br />

Cougar Mountain. Tolay Creek is<br />

more saline than preferred habitat<br />

and lacks canopy cover along<br />

creek.<br />

Behren’s silverspot (butterfly)<br />

Speyeria zerene behrensii<br />

E/–<br />

Pacific side of the Coast Ranges from<br />

Point Arena County to Cape<br />

Mendocino, Mendocino County<br />

Habitats with larval food sources<br />

(violets) are required; specific habitat<br />

unknown<br />

None. Project outside of known<br />

range.<br />

Callippe silverspot<br />

Speyeria callippe callippe<br />

E/–<br />

San Bruno Mountain, San Mateo<br />

County, and a single location in<br />

Alameda County.<br />

Open hillsides where wild pansy (Viola<br />

pendunculata) grows; larvae feed on<br />

Johnny jump-up plants, whereas adults<br />

feed on native mints and non-native<br />

thistles.<br />

High. Recorded to occur at Sears<br />

Point since 1988 (USFWS 2007).<br />

Suitable habitat, (Viola<br />

pedunculata) present at project<br />

site.<br />

Myrtle’s silverspot butterfly<br />

Speyeria zerene myrtleae<br />

E/–<br />

Historically known from San Mateo<br />

County north to the mouth of the<br />

Russian River in <strong>Sonoma</strong> County. No<br />

butterflies have been observed<br />

recently at the known population sites<br />

near Pacifica and San Mateo in San<br />

Mateo County.<br />

Inhabits coastal terrace prairie, coastal<br />

bluff scrub, and associated non-native<br />

grassland habitats where the larval food<br />

plant, Viola sp. occurs.<br />

High. Documented occurrences<br />

adjacent to project site; suitable<br />

habitat (Viola sp.) occurs on site.

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