Peter Waechtershaeuser / Changeable Hawk-Eagle (Spizaetus cirrhatus), Sri Lanka

Lucas Bustamante / Crested hawk-eagle (Nisaetus cirrhatus) Yala National Park, Southern Province, Sri Lanka

Eric Sohn Joo Tan/ BIA / Changeable Hawk-Eagle (Spizaetus cirrhatus), Bundala National Park, Sri Lanka

Clement Francis Martin/ BIA / Changeable Hawk-Eagle (Spizaetus cirrhatus), India

Robin Chittenden / Crested hawk-eagle (Spizaetus cirrhatus ceylanensis) perched, Sri Lanka.

Robin Chittenden / Crested hawk-eagle (Spizaetus cirrhatus ceylanensis) perched, Sri Lanka.

Lucas Bustamante / Crested hawk eagle (Nisaetus cirrhatus) perched, Yala National Park, Southern Province, Sri Lanka.

Hanne & Jens Eriksen / Crested hawk eagle (Nisaetus cirrhatus) perched in tree, India, January.

Bernard Castelein / Changeable hawk eagle (Spizaetus cirrhatus), Kaziranga National Park, Assam, India.

Bernard Castelein / Changeable hawk eagle (Spizaetus cirrhatus), Kaziranga National Park, Assam, India.

Ernie Janes / Crested hawk eagle (Nisaetus cirrhatus) immature, Sri Lanka

Ernie Janes / Crested hawk eagle (Nisaetus cirrhatus) immature, Sri Lanka

Laurent Geslin / Juvenile Crested / Changeable hawk eagle (Nisaetus cirrhatus) Kahna NP, India

Loic Poidevin / Crested / Changeable hawk eagle (Spizaetus / Nisaetus cirrhatus) Kaziranga National Park, Assam, India

Kevin Schafer / Crested / Changeable Hawk Eagle (Nisaetus cirrhatus) perched on dead log. Yala National Park, Sri Lanka.

Kevin Schafer / Changeable Hawk-Eagle (Spizaetus cirrhatus) juvenile, Yala National Park, Sri Lanka

Pete Oxford / Crested / Changeable Hawk-Eagle (Nisaetus cirrhatus) Gir Forest National Park. Gujarat, India.

Pete Oxford / Crested / Changeable Hawk-Eagle (Nisaetus cirrhatus) Gir Forest National Park. Gujarat, India.

Nick Garbutt / Changeable / Crested hawk eagle {Nisaetus cirrhatus} plucking feathers from its dead prey (possibly a White-eyed Buzzard). Bandhavgarh National Park, Madhya Pradesh, India.

DAVID TIPLING / Crested / Changeable hawk eagle at water {Nisaetus cirrhatus} North India

Kristel Richard / Crested hawk eagle (Nisaetus cirrhatus) juvenile perched on a branch, Pench National Park, Madya Pradesh, India.

Karine Aigner / Changeable hawk-eagle / Crested hawk-eagle (Nisaetus cirrhatus) perched on branch, Bardia National Park, Terai, Nepal.

Karine Aigner / Changeable hawk-eagle / Crested hawk-eagle (Nisaetus cirrhatus) perched on branch in mist, Bardia National Park, Terai, Nepal.