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Soil Investigations for Data Collection in the Delta Initial Study/Proposed Mitigated Negative Declaration 50 Implementation of mitigation measures to avoid impacts to all suitable aquatic habitat (MM BIO-1 and MM BIO-2), upland refugia habitat (MM AES-1 and MM BIO-2), and individuals that could be moving through the Study Area (MM AES-2, MM BIO-1 and MM BIO-2), would reduce potential project impacts to western spadefoot to: Less than Significant with Mitigation Incorporated. California legless lizard (Anniella pulchra) California legless lizard is identified as a CDFW Priority Two Species of Special Concern (CDFW 2019b, Thompson et al 2016). It is the only species of legless lizard found in California and ranges from Contra Costa County south to Baja California, at elevations from sea level to 5,900 feet (Thompson et al 2016, Stebbins 2003). California legless lizard is a medium sized lizard, ranging from four to seven inches SVL. It is metallic light silver, beige, olive brown or black with a yellow ventral surface, a shovel shaped snout, blunt tail and no external ear openings. It is found in oak woodland, chaparral, riparian woodland, oak-pine forest and desert scrub with loose soil or leaf litter for burrowing, and adequate moisture and surface cover. California legless lizard is primarily diurnal and crepuscular and is rarely active on the surface. It spends most of its time just beneath the surface but can be found in depths of up to 2 feet. Breeding occurs between early spring and mid-summer, with an average gestation of four months (Thompson et al 2016). They bear one to four live young from September to November (Stebbins and McGinnis 2012). Sexual maturity is reached in males at 2 and females at 3 years of age (Thompson et al 2016). California legless lizard has a low potential to occur within the Study Area based upon the presence of potentially suitable habitat, the southern portion of the Study Area being within the northern edge of the species range, and proximity to reported occurrences. The closest occurrences of California legless lizard are over 5 miles west of the Study Area in the vicinity of Brentwood and the Antioch Dunes. Implementation of mitigation measures to avoid impacts to potential habitat (MM AES-1 and MM BIO-1), and individuals that could be moving through the Study Area (MM BIO-1 and MM BIO-2), would reduce impacts to California legless lizard to: Less than Significant with Mitigation Incorporated. California glossy snake (Arizona elegans occidentalis) California glossy snake is identified as a CDFW Priority One Species of Special Concern (CDFW 2019b, Thompson et al 2016). California glossy snake is a medium sized, from 25 to 39 inches SVL, tan or brown colubrid with dark brown blotches down the back. It has unkeeled scales giving it a glossy appearance, and a single pair of prefrontals. The species occurs from Contra Costa County