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• for fish and occasional waterfowl. The Bald Eagle is listed as a <br />permanent resident in this section of Colorado (Chase et al., <br />1983). Three nest sites have been located on the Colorado River <br />between Parachute and Glenwood Springs, none of which are near the <br />proposed mine area. No eggs were laid in any of the three nests in <br />1981 (Bureau of Reclamation, 1981). Human presence, incomplete <br />reproductive behavior, or food supply failure are listed as cause <br />for unsuccessful nesting. Eagles are also known to be quite <br />susceptible to human activity on its wintering grounds (Stamaster <br />and Newman, 1978). The Colorado River is prime wintering area for <br />bald eagles. Maximum numbers of bald eagles recorded on the <br />Colorado River between Glenwood Springs and the Utah-Colorado <br />border in the winters of 1978-1979, 1979-1980, and 1980-1981 were <br />96, 48, and 39, respectively (Bureau of Reclamation 1981). Total <br />numbers of bald eagle observations in these periods were 231, 204, <br />and 155, respectively. Average numbers of bald eagles observed per <br />river mile in these periods were 0.24, 0.25, and 0.26, respective- <br />. ly. Limited presence has also been recorded on the Colorado River <br />in the area of the proposed surface facilities (BLM Unpublished <br />Data). Habitat of particular importance are tall snags adjacent to <br />the river which provide perch and roost sites, although no federal <br />critical habitat for the bald eagle has been designated in <br />Colorado. Based on existing disturbance in the area, the effects <br />of mining on wintering populations and their habitat would be <br />negligible. <br />Peregrine Falcon (Falco peregrinus anatum) State and Federal <br />Endangered Species. Habitat requirements for nesting peregrines <br />are precipitous cliffs ranging in height from 90 to 2100 feet with <br />ledges, potholes or caves. Nests are usually located below the <br />9500 foot elevation. A pair will abandon a nest if disturbed by <br />human activity during courtship; however, once eggs are laid, the <br />pair will not abandon the nest site. Food requirements are small <br />to moderate-sized birds within a 10 to 15 mile radius of the nest. <br />. Key hunting areas are riparian habitats along rivers and streams, <br />ponds, marshes, meadows and grain croplands. <br />NCEC - Coal Ridge #1 3-91 ABC/1145/900301 <br />