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[~eccmber 1, 2003 Paye 3-1 7 small size of suitable forest patches. Goshawks remain in winter, and may occur periodically in the LBA tract area outside of the nesting season. Olive-sided Flycatcher. Olive-sided flycatchers are neo-tropical migrants nesting in coniferous forests and woodlands with adequate snags, often near water (Altman and Sallabanks, 2000). This species nests in the North Fork watershed (Kingery, 1998), and probably occur in the LBA tract area as summer breeders and spring and fall migrants. Riparian forests along Raven Gulch provide good nesting and foraging habitat for olive-sided flycatchers. Lewis's Woodpecker. In Colorado, Lewis's woodpeckers are yearlong residents that migrate attitudinally, common up to 7,000 feet and rarer at higher elevations (Andrews and Righter, 1992). Nest sites are usually in riparian cottonwood woodlands (Kingery, t 998), and they rely on soft dead wood provided by snags. Lewis's woodpeckers winter in areas of abundant mast, such as oak woodlands or agricultural areas. Lewis's woodpeckers breed in the North Fork watershed (Kingery, 1998) and may breed or winter in the LBA tract area in lower riparian forests in open stands of narrowleaf cottonwood and conifers with abundant snags. Purple Martin. Purple martins are neotropical migrants, in Colorado nesting in old woodpecker holes at edges of aspen stands, usually near water. Purple martins breed in the North Fork watershed (Kingery, 1998), and may nest in the LBA tract in aspen stand edges. Tiger Salamander. Tiger salamanders are found in virtually all non-flowing aquatic habitats in Colorado (Hammerson, 1999). They prefer mud-bottomed ponds, lakes, and reservoirs for breeding and larval stages, and adult tiger salamanders occur on land in dense vegetation or under debris, sometimes a considerable distance from water. Tiger salamanders occur in the North Fork Gunnison River watershed (Hammerson, 1999), and populations have been identified on NFS lands near the LBA tract area (Wang, 2002). Tiger salamanders may breed in Raven Gulch, and non-breeding tiger salamanders could also occur on most NFS and BLM lands in the LBA tract. Northern Leopard Frog. Northern leopard frogs occur in the North Fork Gunnison River downstream from the LBA tract area (Hammerson, 1999), and the Forest Service has found them in the Paonia Ranger District typically in ponds and still water areas.but sometimes in intermittent streams (Wang, 2003). Northern leopard frogs may breed in the lease area in Raven Gulch. Wolverine. Wolverines formerly ranged throughout Colorado but apparently are extirpated from the state. The Colorado Division of W ildlife may reintroduce wolverines in the future. Potential habitat exists for wolverines throughout the LBA tract area. r Spotted Bat. Spotted bats occur in widely scattered locations in the western United States (Barbour and Davis, 1969), from low desert to montane coniferous forests usually below 8,000 feet elevation (Watkins, 1977). Spotted bats are apparently rare in Colorado (Fitzgerald et al., 1994; Armstrong et al., 1984), with only a few records from canyon country of Montezuma and Moffat counties. Canyons and cliffs provide important roosting sites, especially near riparian areas (Easterla, 1973; Leonard and Fenton, 1983). Spotted bats are not known to occur in the LBA tract area, but the species' distribution is not well documented. Sandstone cliffs along the West Flatiron rim contain crevices that could provide suitable roosting habitat for spotted bats, and potential foraging areas exist throughout the LBA tract. Enwrontnti n"3i ,assessment West Flatiron LBA Tract C3u~~nr.;cfr~ Gnunty, Colorado