Argentina, Bolivia, Brazil, Ecuador, French Guiana, Guyana, Paraguay, Suriname.
Locally in the Guianas, through eastern Brazil (Amazonia west to R Branco and R Purús) south to eastern Bolivia (Santa Cruz), Paraguay and northern Argentina (Misiones, Jujuy and Salta).
Rufous-thighed Kite (Harpagus diodon) [XC216857]
by Guilherme Melo from Indaial, Indaial, Santa Catarina, Brazil (song)
Rufous-thighed Kite (Harpagus diodon) [XC176502]
by JAYRSON ARAUJO DE OLIVEIRA from Sitio Tomio, Salete, Santa Catarina State, Brazil (flight call, song)
Subspecies
Plumage shows very close resemblance to Bicolored Hawk (Accipiter bicolor), perhaps suggesting protective mimicry.