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7.B. - Page 56 2 Environmental Analysis <br /> observed within or adjacent to the proposed project area. However, four previous <br /> documented occurrences of CLT nesting sites in the vicinity of the project were reported <br /> in 1970. The closest reported occurrence of CLT nesting sites was on Bair Island. The <br /> CLT is considered likely to occur within the project area. <br /> • Alameda song sparrow (Melospiia melodic pusillula). The Alameda song sparrow is listed as <br /> a special-status species. Coastal salt marsh found along channels and creeks is their <br /> primary habitat. Five occurrences of the Alameda song sparrow have been documented <br /> within a five-mile radius of the project area. The most recent occurrence was in 2004 on <br /> Bair Island. No Alameda song sparrows were observed during the site assessment. The <br /> presence of suitable north coast salt marsh habitat within Redwood Creek suggests that <br /> Alameda song sparrow may occur within or near the project area. <br /> • Western snowy plover (Charadrius alexandrines rivosus). The western snowy plover (WSP) is <br /> listed as threatened by the USFWS. No suitable habitat was found during the site <br /> assessment within or adjacent to the proposed project area. No other occurrences of <br /> WSP within or adjacent to the proposed project area were documented. The WSP has a <br /> low potential to occur within the project area. <br /> • Salt marsh common yellowthroat (Geothlypis trichas sinuosa). The salt marsh common <br /> yellowthroat is a non-migratory bird that is a state-listed special-status species. The <br /> optimal habitat for the salt marsh common yellowthroat includes dense woody <br /> vegetation. Salt marsh common yellowthroat was not observed during the site assessment, <br /> and no occurrences of have been documented within a five-mile radius of the project <br /> area. However,due to the presence of suitable habitat in areas adjacent to the project <br /> area, the salt marsh common yellowthroat may occur within or near the project area. <br /> • Salt marsh wandering shrew (Sorex vagrans halicoetes). The salt marsh wandering shrew <br /> (SMWS) is a state-listed species of special concern. One occurrence within a five-mile <br /> radius of the project area was documented in 1985. The SMWS was not observed during <br /> the site assessment. However, suitable habitat is adjacent to the project,and the SMWS <br /> may occur within or near the project area. <br /> • Salt-marsh harvest mouse (Reithrodontomys raviventris). The salt- marsh harvest mouse <br /> (SMHM) is listed as a federally and state endangered species. The SMHM is confined to <br /> salty marsh habitat within the San Francisco Bay estuaries. SMHM depend heavily on <br /> dense vegetation, especially pickleweed,within marsh-like habitat. No SMHM were <br /> observed during the site assessment. However,due to presence of suitable habitat in <br /> areas adjacent to the project, the SMHM may occur in the project area. <br /> Special Status Plant Species and Communities. The reconnaissance levels survey for special- <br /> status species and endangered plants included searching of the California Native Plant Society <br /> (CNPS),the USFWS, and the CDFW databases. Based on suitable habitat in the project area, three <br /> special-status plant species were identified as having potential to occur in the area. These include the <br /> species listed below: <br /> 2-16 US 101 Pedestrian Undercrossing and Bair <br /> Island Road Storm Drain Pump Station Project <br />