French: Buse de Swainson German: Präriebussard Spanish: Busardo chapulinero
Fort Vancouver, Washington, USA
W & C North America from EC Alaska (rare) and W Canada S through W USA (E to Minnesota and EC Texas) to N Mexico. Winters mostly in South America, especially in N Argentina and, to some extent, neighbouring regions; also some in S & W USA.
48–56 cm; male 683–936 g, female 937–1700 g; wingspan 117–137 cm. Extremely variable: adult pale morph has brown upperparts and bib, with white throat... read more
Vocalizes mainly in breeding season and to lesser extent on winter quarters, principally giving a... read more
Most habitats, from woodland of aspen, oak and conifers to steppes and deserts; most common in... read more
Food and feeding
Seasonally variable diet: in breeding season, mainly mammals (rabbits, ground squirrels, voles and bats), but also birds (including Western... read more
Apr–Aug, commencing later (Jun) further N. Solitary, but often associated with B. regalis; in some areas, latter species,... read more
Highly migratory. Main non-breeding grounds (boreal winter) in Argentina, but birds speculated to... read more
Status and conservation
Not globally threatened (Least Concern). CITES II. Total population conservatively estimated at 40,000–55,000 breeding pairs, but much higher numbers counted on... read more
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