Abstract
In recent years the red-shouldered hawk (Buteo lineatus) has declined in numbers in Iowa (Brown 1964, Koenig 1975) and nationwide (Cohen 1970:14, 36; Brown 1971; Hackman and Henny 1971). In the Midwest, it is listed as rare or endangered in Illinois, Iowa, Michigan, Missouri, and Wisconsin (Roosa 1977, Merz 1978). The decline probably is due directly or indirectly to habitat alteration (Todd 1940, Cohen 1970, Henny et al. 1973, Oberholser 1974, Portnoy 1974, Campbell 1975, Bock and Lepthien 1976). The objectives of this study were to systematically survey potential redshouldered hawk nesting habitat in Iowa using a land-use data base, and to provide information on habitat use and management recommendations.
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