World Bird List

Species factsheet
Variable Hawk (Geranoaetus polyosoma)

Order: Geranoaetus polyosoma
Family: Kites, Hawks, Eagles (Accipitridae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
polyosoma Andes from w Colombia to Tierra del Fuego, Falkland Is.
exsul Juan Fernandez Is. (Chile)
poecilochrous Andes from s Colombia to s Ecuador
fjeldsai Andes from n Peru to nw Argentina