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Fishery Resources The North Platte River in Wyoming is primarily a cold-water stream, providing many areas of good to excellent fishing for rainbow and brown trout. A number of the mainstem reservoirs are also noted for good fishing, including both cold-water species, such as trout, and warm- water species, such as walleye and yellow perch. The North Platte in Nebraska is classified as a Class 1 stream from Lake McConaughy upstream to the State line. This reach of the river serves as a corridor for rainbow trout migration from Lake McConaughy to important spawning tributaries in the Bridgeport to Henry reach of the river. These migrating rainbows average in the 3 to 4 pound class. Most of the reach below Lake McConaughy is classified as a Class 2 stream. Warm-water gamefish, such as channel catfish, largemouth and smallmouth bass. sunfish, crappie, northern pike, and walleye, can be found throughout the North Platte in Nebraska. Lake Minatare is considered a walleye fishery of local and regional significance. Lake McConaughy is a fishery of statewide importance in Nebraska (NGPC, 1972). It provides both cold and warm-water habitat and excellent sport fishing for a variety of species, including McConaughy rainbow trout, white bass, striped bass, walleye, yellow perch, crappie, smallmouth bass, and channel catfish. Threatened and Endangered Speci es. --No federally 1 i sted threatened or endangered fish species occur in the area of the North Platte River under study. The State of Nebraska recognizes several species as threatened; the State of Wyoming 1 ists six species as rare. These species are shown in table 4. South Platte River Habitat Types Most of the habitat types along the South Platte River are comparable to those previ ously descri bed for the North Pl atte. Types wh ich di ffered significantly from the North Platte cOOlmunities are ponderosa pine, Douglas fir, and sand sage. Wildlife Resources Major Game and Recreation Species.--The description of game and recreation species found along the North Pl atte River is appl icable to the wildlife resources associated with the South Platte. The Waterton Canyon bighorn sheep herd has subsequent 1 y been dec imated by disease, and. now numbers only about 20 individuals (Schoonveld, 1981). Concentration Areas.--As on the North Platte River, a number of areas are found. along the South Pl atte which serve as concentration areas for cer~ain wildlife species. In the r.eachfrom Greeley downstream, the South Pl atte River and adja~ent offstream reservoirs and warm-water sloughs serve as a major wint~ri~g area for waterfowl, supporting about 16