Swainson's Hawk (Buteo swainsoni)
Swainson's Hawk: Breeds on the western plains of North America and southwest Canada from Texas to the Yukon. In the winter, most fly south to the pampas of Argentina, a distance of more than 5,000 miles. Preferred habitats include prairies, plains, and other wide-open ranges with minimal tree cover; commonly seen perched on poles or fence posts.
* The Swainsons Hawk was first described in 1838 by Charles Bonaparte, French naturalist and ornithologist, and nephew of the Emperor Napoleon. It was named after William Swainson, a British naturalist.
* It is known as the locust hawk, they will eat numerous amounts of these insects and in turn ingest a high amount of toxin, which causes thinning of egg shells.
* Chicks frequently kill and eat the youngest nestlings. The killing of siblings may be related to food availability, but the ultimate cause is unknown.
Identification and text source: www.whatbird.com