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Soil Investigations for Data Collection in the Delta Initial Study/Proposed Mitigated Negative Declaration 51 south to San Quintin, Baja California, including the central San Joaquin Valley and along the base of the Southern Coastal Range, at elevations ranging from sea level to 5,900 feet (Thompson et al 2016). It does not occur along the coast of California north of Ventura County. California glossy snake is found in grasslands, coastal sage scrub and chaparral in areas where soil is loose. California glossy snake is primarily nocturnal, active between late February and November with activity peaking in May. Little is known about reproduction in the wild, but young of year are generally found in September. During the day, it will use existing mammal burrows and burrows under rocks or will dig their own burrows. California glossy snake has a moderate potential to occur within the Study Area based upon presence of suitable habitat, species range and proximity to reported occurrences. Although there are no reported occurrences within 6 miles of the Study Area the reported occurrences occur both to the northwest south of the southernmost portion of the Study Area, ranging from the Antioch Dunes in Contra Costa County to south of Clifton Court Forebay, in Alameda County. Implementation of mitigation measures to avoid impacts to potential habitat (MM BIO-1), and individuals that could be moving through the Study Area (MM AES-2, MM BIO-1 and MM BIO-2), would reduce impacts to California glossy snake to: Less than Significant with Mitigation Incorporated. Western Pond Turtle (Emys (= Actinemys) marmorata) Western pond turtle is under review for listing under the FESA and is a CDFW Priority One Species of Special Concern (USFWS 2015b, Thompson et al 2016). Western pond turtle is a small to medium-sized aquatic turtle, measuring 6.5 to seven inches straight carapace length. They are brown, tan, olive with a low, unkeeled carapace with a non-serrated rim (Nafis 2019, Stebbins 2003). Western pond turtle is found from the Pacific Coast inland to the Sierra Nevada foothills to elevations as high as 6,700 ft above sea level. Western pond turtle is a highly aquatic species and can be found in a variety of habitat types including streams, rivers, sloughs, lakes, ponds, reservoirs, marshes, seasonal ponds, and other wetland habitats (Thompson et al 2016). It requires basking sites such as partially submerged logs, rocks, mats of floating vegetation, or open mud banks for thermoregulation, and access to suitable upland habitat with loose soils for nesting, dispersal and overwintering (Thompson et al 2016). It is active year-round in warmer locations but will spend winter months in colder climates in a state of dormancy often burrowing into loose soil or leaf litter on land, or using undercut banks, snags, rocks or bottom mud in ponds (Thompson et al 2016). Western pond turtle diet consists of aquatic invertebrates, algae and other vegetation, small vertebrates and carrion.