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3.32 <br />Table 3.13. Important Life History Information for Bald Eagles <br />and Peregrine Falcons. <br />I. Bald Eagles - A rare breeder in northwest Colorado. <br />Nesting Eagles <br />- Eagles leave Colorado in March to go to nesting <br />areas. <br />- Nests can be in cottonwood, Douglas fir, or pon- <br />derosa pine trees. <br />- Nest trees are usually near water. <br />- Eagles are usually associated with the nest tree <br />from January to early Ju'jy in northwest Colorado. <br />- Foods include primarily fish, but waterfowl, song- <br />birds, invertebrates and carrion are also used. <br />Wintering Eagles - A common winter resident in northwest Colorado. <br />- Eagles occur from November through March, with peak <br />numbers in late January to early February. <br />- Diurnal perches are usually in cottonwoods within <br />100 feet of water. <br />- Nocturnal roosts are usually in stands of cotton- <br />woods along a river. <br />- In the Colorado River area, fish are the most impor- <br />tant food, with cottontails, jackrabbits, deer <br />carrion, and waterfowl important alternates. <br />II. Peregrine Falcons - Falcons are rare breeders in northwest Colorado. <br />Nesting Falcons <br />- Most roost/nest areas are within one mile of a <br />stream or river. <br />- Peregrines can hunt up to at least 10 miles from the <br />roost/nest area. <br />- They feed on many medium-sized birds. <br />- Preferred hunting areas include marshes, riparian <br />zones, pastures, meadows, lakes, reservoirs and <br />gorges. <br />- They may be on nest sites from late February into <br />September. <br />Wintering Falcons - Little is known of wintering and migrating habits <br />of falcons in northwest Colorado.