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Winter movements of adult northern goshawks that nested in southcentral Wyoming

Posted date: June 15, 2016
Publication Year: 
1995
Authors: Squires, John R.; Ruggiero, Leonard F.
Publication Series: 
Scientific Journal (JRNL)
Source: Journal of Raptor Research. 29(1): 5-9.

Abstract

Winter movements of four adult northern goshawks (Accipiter gentilis) that nest in southcentral Wyoming were monitored during the winter of 1992-93. Goshawks initiated fall migrations in early fall (primarily mid-September) while weather conditions are moderate. Female 1 migrated 185 km south of her nest. She wintered in a mountainous area in Colorado at a higher elevation (277 4 m) than her nest site (2500 m elevation). Male 1 migrated approximately 65 km west southwest of his nest before he was killed by a hard blow from a blunt object. This strike may have been caused by another raptor or a collision with the ground. Both Female 2 and Male 2 migrated in a southerly direction from their nests. They were located approximately 140 km and 70 km, respectively, from their nests before both birds were lost during inclement weather. All birds returned to their nests from wintering areas between 23 March to 12 April. Results from this study suggest to wildlife managers that some goshawk populations in the Rocky Mountains are migratory; efforts to manage this species need to consider both wintering and nesting habitat requirements.

Citation

Squires, John R.; Ruggiero, Leonard F. 1995. Winter movements of adult northern goshawks that nested in southcentral Wyoming. Journal of Raptor Research. 29(1): 5-9.