Skip to main content
U.S. flag

An official website of the United States government

Influence of poisoned prey on foraging behavior of ferruginous hawks

January 31, 2017

We recorded 19 visits by ferruginous hawks (Buteo regalis) over 6 d at two black–tailed prairie dog (Cynomys ludovicianus) subcolonies poisoned with the rodenticide Rozol® Prairie Dog Bait (0.005% chlorophacinone active ingredient) and at an adjacent untreated subcolony. Before Rozol® application ferruginous hawks foraged in the untreated and treated subcolonies but after Rozol® application predation by ferruginous hawks was only observed in the treated subcolonies. We suggest that ferruginous hawks' preference for hunting in the treated subcolonies after Rozol® application was influenced by the availability of easy-to-capture prey, presumably due to Rozol® poisoning. The energetically beneficial behavior of favoring substandard prey may increase raptor encounters with rodenticide exposed animals if prey vulnerability has resulted from poisoning.

Publication Year 2017
Title Influence of poisoned prey on foraging behavior of ferruginous hawks
DOI 10.1674/0003-0031-177.1.75
Authors Nimish B. Vyas, Frank Kuncir, Criss C. Clinton
Publication Type Article
Publication Subtype Journal Article
Series Title The American Midland Naturalist
Index ID 70143864
Record Source USGS Publications Warehouse
USGS Organization Patuxent Wildlife Research Center