AgdaPkt 2016-02-22 Closed and Interview and Joint SA PFA

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APPENDICES City of Redwood City, Public Works Division Initial Study & Mitigated Negative Declaration 5 Blankinship & Associates, Inc. distance between the freshwater Delta and the saltwater Lagoon, the preferred salinities and migratory habits indicate that adults may enter the Lagoon where they may be exposed to water treated with copper containing algaecides and/or aquatic herbicides. Invertebrates No appropriate habitat for invertebrates of concern exists within or downstream from the Lagoon. As such, project activities will not adversely impact invertebrates. Mammals Pacific Western (Townsend’s) Big-Eared Bat (Corynorhinus (Plecotus) townsendii townsendii) Townsend's big-eared bats live in a variety of communities, including coastal conifer and broadleaf forests, oak and conifer woodlands, arid grasslands and deserts, and high-elevation forests and meadows. Throughout most of its geographic range, it is most common in mesic sites. Known roosting sites in California include limestone caves, lava tubes, mine tunnels, buildings, and other human-made structures. Both sexes hibernate in buildings, caves, and mine tunnels, either singly (males) or in small groups (Williams 1986). They feed on various flying insects near the foliage of trees and shrubs and may feed primarily on moths (NatureServe 2004). Since the feeding habits do not focus on emergent aquatic insects or other aquatic prey items, big-eared bats would not be exposed to copper-containing algaecides and/or aquatic herbicides. Therefore, no risk is anticipated. Greater Western Mastiff-Bat (Eumops perotis californicus) Mastiff bats favor rugged, rocky areas where suitable crevices area available for day-roosts. Characteristically, day-roosts are located in large cracks in exfoliating slabs of granite or sandstone. The crevices must open downward, be at least 5 cm wide and 30 cm deep, and narrow to at least 2.5 cm at their upper end. Mastiff bats also frequently roost in buildings, provided these have sheltering places with conditions similar to those described above. They forage at an estimated height of as much as 200 ft above the ground. They probably forage for considerable distances from their roosting sites (Williams 1986). The foraging height of these bats precludes exposure from applications of copper-based algaecides and/or aquatic herbicides. Western Red Bat (Lasiurus blossevillii) The western red bat inhabits grasslands, shrublands, open woodlands, and riparian areas. They typically roost in forests or woodlands, showing a preference for edge habitat (NatureServe 2004, Zeiner et al. 1988). Western red bats often roost in tree foliage along edge habitat, with preference given to sites with protection from above and below. They feed on moths, crickets, beetles and flying ants (Zeiner et al. 1988). Given their diet of terrestrial invertebrates, western red bats would not be exposed to copper- containing algaecides and/or aquatic herbicides. Therefore, no risk is anticipated. Big free-tailed bat (Nyctinomops macrotis) The big free-tailed bat inhabits riparian and rocky areas in rugged country may also be found in shrub desert and woodland habitats (NatureServe 2014). Big free-tailed bats roost in rock crevices in cliffs, building caves, and occasionally in tree holes. They feed primarily on terrestrial insects including large moths, crickets, longhorned grasshoppers, flying ants, stinkbugs, froghoppers, and leafhoppers. Given their diet of terrestrial invertebrates, big free-tailed bats are not likely to be exposed to copper-containing algaecides and/or aquatic herbicides. Therefore, no risk is anticipated. 6.3.A. - Page 74