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C <br />(Family ch ysomelidae) dominated samples and accounted for over 78% of all <br />insects collected. Plant hoppers (Family Fvilgoridae) , the next most common <br />group encountered, accounted for only 6.2% of the insects collected. Both <br />species are commonly found on leafy vegetation. The foyer group is a. very <br />large family (nearly 1400 North American species) and ,many species are quite <br />common. Some are serious pests of cultivated plants and a few act as vectors of <br />plant disease. None of the groups encountered in upland sagebrush or in the <br />other types sampled appear to be in sufficient nunbers, at least in 1979, to <br />pose a serious problem to revegetation success. <br />IVRENEa4ED AND ENDANGERED SPEC 'FRS <br />None of the five species listed as " endangered" by the Federal Register <br />(January, 1979) that could possibly occur on the project area (American peregrine <br />falcon, northern bald eagle, whooping crane, black- footed ferret, and gray wolf) <br />were encountered during wildlife studies conducted during 1979 -1980 at Nucla mine. <br />Bald eagles generally nest in tall trees within a half mile of permanent water <br />s ` (Snow 1973), since successful nesting usually requires a dependable and readily <br />available food supply generally consisting of fish (5pencer 1976). The nearest <br />potential nesting habitat for bald eagles occurs on the Miguel River, approximately <br />seven miles from the study area. The neerest known. bald eagle over - wintering area <br />occurs along the Miguel River (personal communication, March 1980, Rick Sherman, <br />DOW): The Nucla study area probably occurs within the hunting area of the bald <br />eagles wintering along the Miguel River (personal communication, March 1980, <br />Rick Sherman, DOW) ; however, none have been sighted on or near the study area to <br />date.. <br />Peregrine falcons use cliffs most commonly as their nesting sites (Snow 1973). <br />Preferred nesting cliffs are generally quite high, often. overlook water, and allow <br />an extensive view of the surrounding countryside (Hickey 1942). Areas such as <br />these are not present in the vicinity of the Nucla study area. No peregrine <br />falcons have been reported on the study area to date. <br />The principal habitat of black- footed ferrets is prairie dog colonies (Henderson <br />et al. 1974). Three Gunnison's prairie dog colonies are located <br />--4 8- <br />1 ut,aa06° <br />