ITEM 23 ATTACHMENT 6 - Project Plans

Table 2 Special-Status Species for the Las Trampas Ridge, Diablo, Tassajara, Hayward, Dublin, Livermore, Newark, Niles, and La Costa Valley 7.5 Minute Quadrangle Maps1 Common Name/Scientific Name Status (Fed/State/ Other)2 Blooming or Survey Period Habitats of Occurrence Potential on Site Status on Site** California Ridgway’s rail (Rallus obsoletus obsoletus) E/E/FP Resident Small range in the SF Bay Area. Nesting occurs mid- March to July, with peaks in early May and again in early June. Habitat includes pickleweed and cordgrass marshes with high marsh areas. Nests in marshes, and near tidal ponds. No suitable habitat present Presumed absent bank swallow (Riparia riparia) -/T/- April – August Large nesting range in North America and Eurasia. While the species migrates south for the winter, northern winter range includes southern California. Habitat includes open and partial open areas, near flowing water. Nests are in steep sand, dirt, or gravel banks, in burrows dug near the top of the bank. No suitable habitat present Presumed absent yellow warbler (Setophaga petechia) -/-/SSC April – August While the species migrates south for the winter, northern winter range includes southern California. Habitat includes open scrub, second-growth woodland, thickets, farmlands, and gardens. Riparian woodlands with willows are typical of CA population. Nests are placed in upright forks or crotches of bushes, saplings, or large trees. No suitable habitat present Presumed absent California least tern (Sterna antillarum browni) E/E/FP April – November Habitat includes beaches, bays, estuaries, lagoons, lakes, and rivers. Rests and loafs on sandy beaches, mudflats, and salt-pond dikes. May roost at night on sandy beaches. Nests on open, flat beaches along lagoon or estuary margins. No suitable habitat present Presumed absent