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L <br />Presence of animal species as indicated by capture, sightings, tracks, <br />scats, dens, food remains, or other definitive signs was recorded on wildlife <br />observation forms. In aeriLion, important wildlife habitat was noted <br />and mapped. <br />Hall and Kelson (1959) was the nomenclatural authority used for mammals. <br />Murie (1954) was used for identifying animal sign. Avian nomenclature followed <br />the American Ornothologist's Union Checklist 'of North American Birds (AOU <br />1957) as updated by the 32nd supplement to the checklist (AGU 1973). <br />INVERTEBRATES <br />Sweep-net samples were used to determine the species composition and relative <br />abundance of insects in the herb -forb -grass section of the two major vegetation <br />types on the study area (see Results, page 45). Of particular concern in the <br />study was to identify groups of insects (i.e., grasshoppers) that might pose a <br />threat to revegetation success. At five randomly. selected locations in upland <br />sagebrush and grassland pature, a sweep net sample consisting of five full <br />sweeps (approximately 10 m was collected. Five samples also were taken from <br />a revegetation plot at Nucla mine. Insects were killed with cyanide gas and <br />identified and counted by a qualified entomologist. <br />THREATENED AND ENDANGERED WILDLIFE SPECTWA <br />According to the Federal Register (January 17, 1979) five animal species <br />listed as endangered could possibly occur in the study area: <br />Fu L o r creari nus anu :: rm - American peregrine falcon <br />&a?iaaetus leucacephalus - northern bald eagle <br />Grua americana - whooping crane (as a migrant) <br />kt,stela rigripes - black - footed ferret <br />Canis lupus - gray wolf <br />Based on the results of interviews with txw personnel and local residents and <br />JUN 1 1 1980 <br />