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1 March 2011 Observation of Ground Roosting by American Crows
Cory M. Shoemaker, Richard S. Phillips
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Communal winter roosts of American Crows (Corvus brachyrhynchos) often occur in urban areas and may number in the thousands of individuals. We documented the distribution of urban roosts of American Crows in central Ohio and, on 12 January 2010, we observed a roost of ∼2,500 individuals with ∼250–300 birds roosting on the ground. The ground roosting birds remained stationary for the entire observation period of ∼45 min indicating this location was not a stopover site. This behavior may increase thermoregulatory benefits during cold nights assuming decreased predation threats in urban environments. We suggest urban ground roosting behavior by crows may be adaptive in colder environments.

Cory M. Shoemaker and Richard S. Phillips "Observation of Ground Roosting by American Crows," The Wilson Journal of Ornithology 123(1), 185-187, (1 March 2011).
Received: 16 February 2010; Accepted: 1 November 2010; Published: 1 March 2011
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