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APPENDICES
<br />City of Redwood City, Public Works Division Initial Study & Mitigated Negative Declaration
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<br /> 3 Blankinship & Associates, Inc.
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<br />terrestrial animals, short-eared owls are not likely to be exposed to copper-containing algaecides and/or aquatic
<br />herbicides applied to the Lagoon.
<br />
<br />Northern Harrier (Circus cyaneus)
<br />Northern harriers inhabit bogs, fens, herbaceous wetland, alpine, cropland, grassland, and tundra (NatureServe
<br />2014). They frequently nest in dense vegetation with larger and deeper nests often being built in wet or flood-
<br />prone areas. Their diet primarily consists of terrestrial prey such as small mammals (especially voles and cotton
<br />rats), small to medium-sized birds (especially passerines), reptiles, amphibians, large insects, and carrion.
<br />Because they prey mostly on terrestrial animals, northern harriers are not likely to be exposed to copper-
<br />containing algaecides and/or aquatic herbicides applied to the Lagoon.
<br />
<br />Saltmarsh common yellowthroat (Geothlypis trichas sinuosa)
<br />Saltmarsh common yellowthroat inhabit salt marshes and herbaceous wetlands (NatureServe 2014). They nest
<br />just above ground or over water, in thick herbaceous vegetation. Their diet primarily consists of small terrestrial
<br />insects obtained among low plants. Because they prey mostly on terrestrial insects, saltmarsh common
<br />yellowthroat are not likely to be exposed to copper-containing algaecides and/or aquatic herbicides applied to
<br />the Lagoon.
<br />
<br />California Black Rail (Laterallus jamaicensis coturniculus)
<br />Black rails nest in high portions of salt marshes, shallow freshwater marshes, wet meadows, and flooded grassy
<br />vegetation (Eddleman et al. 1988 in Eddleman et al 1994). Most breeding areas are vegetated by fine-stemmed
<br />emergent plants, rushes, grasses, and sedges (Todd 1977 in Eddleman et al 1994). They select sites with
<br />shallow, stable water level, gently sloping shorelines, and vegetation dominated by fine-stemmed bulrush
<br />(Scirpus spp.) or grasses (Repking and Ohmart 1977 in Eddleman et al 1994). They feed on aquatic and
<br />terrestrial invertebrates and seeds, presumably along edges of emergent vegetation (Eddleman et al 1994). The
<br />California black rail may forage in the shallow water at the margins of the Lagoon. However, given the large
<br />amount of potential foraging area, the food items from treated areas would likely only contribute an
<br />insignificant percentage of the total diet. Therefore, the risk posed by copper-containing algaecides and/or
<br />aquatic herbicides applied to the Lagoon is insignificant.
<br />
<br />Alameda song sparrow (Melospiza melodia pusillula)
<br />Alameda song sparrow is endemic to California where it is restricted to tidal salt marshes (Shuford and Gardali
<br />2008). Vegetation is required for nesting sites with upper marsh vegetation being required so that nests remain
<br />dry during all but the highest tides. The majority of their diet consists of terrestrial vegetable matter and insects.
<br />Because they prey mostly on terrestrial vegetable matter and insects, Alameda song sparrows are not likely to
<br />be exposed to copper-containing algaecides and/or aquatic herbicides applied to the Lagoon.
<br />
<br />California clapper rail (Rallus longirostris obsoletus)
<br />California clapper rail inhabit herbaceous wetlands (NatureServe 2014). They nest in cordgrass, pickleweed,
<br />gum-plant, or salt grass within marshlands near tidal ponds, arranging plant or drift material over their nest as a
<br />canopy. Their diet consists mostly of mussels, clams, small crabs, and spiders. The California clapper rail may
<br />forage in the shallow water at the margins of the Lagoon. However, given the large amount of potential foraging
<br />area, the food items from treated areas would likely only contribute an insignificant percentage of the total diet.
<br />Therefore, the risk posed by copper-containing algaecides and/or aquatic herbicides applied to the Lagoon is
<br />insignificant.
<br />
<br />Black skimmer (Rynchops niger)
<br />Black skimmer inhabit primarily coastal waters, including bays and estuaries, and may also be found in rivers,
<br />lakes, and herbaceous wetlands (NatureServe 2014). They nest primarily near coasts on sandy beaches, shell
<br />banks, coastal and estuary islands, on wrack and drift of salt marshes, along tropic rivers, and along salt pond
<br />levees. The species eats mainly small fish and crustaceans and skim the surface of water for food while flying.
<br />Given the large amount of potential foraging area, the food items from treated areas would likely only
<br />contribute an insignificant percentage of the total diet. Therefore, the risk posed by copper-containing
<br />algaecides and/or aquatic herbicides applied to the Lagoon is insignificant.
<br />6.3.A. - Page 72
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