. Kig. 28.—Crystal fllen Eagle Roost in Hancock ("oiintv near Lock and Dam 19 on the Mississippi River. The sycamore {Plaluniis oc- inlniliilis) in the foreground was used by as many as 20 eagles nightly during January and February, 1979 (David L. Fischer, per- sonal communication 1986). Houses built nearby during the sum- mer of 1979 discouraged subsequent eagle use of this glen as a night roost (Photo by David L. Fischer). ing and resting habitat, but most night roosting occur- red in three hollows within the park. 5) Clarksville Island is located in the Mississippi River along Calhoun
. Kig. 28.—Crystal fllen Eagle Roost in Hancock ("oiintv near Lock and Dam 19 on the Mississippi River. The sycamore {Plaluniis oc- inlniliilis) in the foreground was used by as many as 20 eagles nightly during January and February, 1979 (David L. Fischer, per- sonal communication 1986). Houses built nearby during the sum- mer of 1979 discouraged subsequent eagle use of this glen as a night roost (Photo by David L. Fischer). ing and resting habitat, but most night roosting occur- red in three hollows within the park. 5) Clarksville Island is located in the Mississippi River along Calhoun County. The island, owned bv The Nature Conservancy, was used by eagles through- out the winter. 6) Burlington, Craigel, and Otter islands are lo- cated in the Mississippi River along Henderson County and each has a night roost. A variety of habitats appropriate for daytime use by bald eagles is available in the area. Very few night roost areas along the Illinois River have been identified, mainly because of a lack of re- search. Robert Phelps, John Grigsby, and James Waycuilis (personal communications 1986) reported roosts in Putnam County near the Illinois River, at Rice Lake in Fulton County, and at Marshall County Conservation Area, respectively (Fig. 29). Additional night roosts likely occur in the vicinity of foraging areas such as Goose and Senachwine lakes. Peoria Lake, Chautauqua National Wildlife Refuge, and San- ganois Conservation Area. Roost areas were also iden- tified at Union County and Horseshoe Lake Conser- vation areas and at CONWR (Sabine & Klimstra 1985) (Fig. 29). RECENT BALD EAGLE NESTING Bald eagles have constructed seseral nests in Il- linois since 1973, and at least 16 eaglets fledged from these nests from 1978 to 1987 (Fable 6). The first rc( cut bald eagle nest in Illinois was built at COXWR in 1973. Eagles were seen at this nest again in 1974. Inil no eggs were laid in either of these \ears. .\ new nest was built at COXWR in 1979. One eaglet f
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