The Chaco Eagle has a prominent crest and inhabits savannas and open woodland in Argentina.
Adults have a grey head with a prominent crest, a grey-brown back, and a broad pale band with a black band on the tail. Juveniles are paler and streaked below.
It occurs alone or in pairs and feeds on mammals and rodents. The source describes it as semi-nocturnal.
An extinction-risk assessment has not been added yet.