Ferruginous hawk nesting on the US DOE Hanford Site: Case history of a recent invasion caused by transmission lines.

摘要

Ferruginous hawks were an uncommon nesting raptor on the US DOE Hanford Site prior to 1987, with only one or two pairs nesting each year. In 1987, four pair were found nesting on transmission towers. In 1988, seven pairs were observed nesting on the towers. This recent increase in nesting pairs may correspond to an acceptance phenomena related to age of the transmission towers. The increase may be due to an overall increase in the population of ferruginous hawks in Washington. 12 refs., 4 figs.