Buse à gorge blanche Buteo albigula

Locally fairly common summer breeder in temperate rainforests of southern Chile and adjacent Argentina; migrates north in March–April to winter in Andes from Bolivia to Venezuela, returning in September–October. Usually seen in flight over forest and edge, circling high or kiting motionless in the wind; rarely seen perched. Note dark head and clean white throat, diagnostic dark “armpits,” and rather flat-winged gliding with wingtips curled up slightly. Compare with immatures of the larger Variable and Rufous-tailed Hawks.