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16 I I I I I I I I I I I I I I I I I I I Raptors - Red-tail hawks and golden eagles are the most common raptors in the area. Cooper's hawks and sharp-shinned hawks are less common. However, they were likely more abundant when cottonwoods were more prevalent on the site and may be again if cottonwood forests become re-established. The American kestrel, rough-legged hawk, great horned owl and northern harrier may also be observed in this area. Nongame Birds - Many species of small birds are common in the variety of habitats that exist on this site. The American robin, black-billed magpie, starling, meadowlark, red-winged blackbird and mountain bluebird are commonly occurring species. One group of nongame birds which are of particular interest due to declining population numbers are the Neotropical Migrants. These species nest on the site during the summer after migrating from Mexico, Central and South America. Reptiles and Amphibians - Wetland and riparian areas are important habitats for reptiles and amphibians. Five species of amphibians and approximately twenty species of reptiles could potentially be found at this site (Keith Day, UDWR, pers. comm.). Leopard frogs, garter snakes and several toad species are the most common species in the wetland communities. Upland areas are occupied by species such as gopher snakes and sagebrush lizards. Fisheries - The Green River supports a diverse fishery. Common species include the northern pike, walleye, green sunfish, carp, red shiner, fathead minnow, redside shiner, bluehead sucker, black bullhead and channel catfish. Threatened, Endangered and Sensitive Species - Species which occur or could potentially occur at the study site include the bald eagle, peregrine falcon, ferruginous hawk, whooping crane, Lewis' woodpecker, river otter, Colorado squawfish, humpback chub, bony tail chub, roundtail chub, razorback sucker and flannelmouth sucker. Ute Lady's-Tresses (Spiranthes diluvialis) is an endangered plant species that could potentially occur on the project site. Specimens have been collected in this general area. The elevational range of known Spiranthes diluvialis populations is 4,300 to 7,000 feet. Most occurrences are in moist to wet meadows along perennial streams, but some localities in the eastern Great Basin are in similar situations near freshwater lakes or springs. It has a close affinity with floodplain areas where the water table is near the surface throughout the growing season and into late summer and early autumn. A few populations in eastern Utah have been found in riparian woodlands, but it generally prefers open, forb-dominated sites. Invertebrates - The status of the invertebrate populat~on on this site is critical to the successful implementation of this plan.