Bernard Castelein / Red headed vulture (Sarcogyps calvus) perched, preening feathers, Keoladeo Ghana / Bharatpur NP, Rajasthan, India

Jabruson / Red headed vulture (Sarcogyps calvus) perched on stump, sunning itself, Keoladeo Ghana / Bharatpur NP, Rajasthan, India

Nick Garbutt / King / Red headed vulture {Sarcogyps calvus} perched. Bandhavgarh National Park, Madhya Pradesh, India.

Chris Gomersall / Red headed vulture in tree {Sarcopgyps calvus} Bandhavgarh NP, India

Dave Watts / King vulture (Sarcogyps calvus) just outside Chitwan National Park, Nepal

Oriol Alamany / Red-headed vulture (Sarcogyps calvus) in flight, Ranthambhore National Park, Rajasthan, India. Critically endangered.