Barrie Britton / Red-headed vultures (Sarcogyps calvus) and White-rumped vultures (Gyps bengalensis) and Slender-billed vultures (Gyps tenuirostris). Preah Vihear Protected Forest, Cambodia. Take on location for BBC '...

Barrie Britton / Red-headed vulture (Sarcogyps calvus) and Slender-billed vultures (Gyps tenuirostris) at cow carcass. Preah Vihear Protected Forest, Cambodia. Taken on location on location for BBC 'Lands of the Monso...

Ashish & Shanthi Chandola / Red-headed Vulture (Aegypius calvus) perched, Bandipur Tiger Reserve, Karnataka, India, July. Critically endangered species

Loic Poidevin / Red-headed vulture (Sarcogyps calvus) on branch. Bandhavgarh National Park, India.

Loic Poidevin / Red-headed vulture (Sarcogyps calvus) in flight. Bandhavgarh National Park, India.

Loic Poidevin / Red headed / Asian king vulture (Sarcogyps calvus) in the river, Kanha National Park, Madhya Pradesh, India, March

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

Sharon Heald / Red-Headed Vulture [Sarcogyps calvus] being attacked by Large-Billed Crow [Corvus macrohynchos] Bandhavgarh NP, Madhya Pradesh, India, March

Tony Heald / Red-Headed Vulture [Sarcogyps calvus] perched, Bandhavgarh NP, Madhya Pradesh, India, March

Bernard Castelein / Red headed vulture {Sarcogyps calvus} in tree, Madhav NP, Madhya Pradesh, India

Bernard Castelein / Red headed vulture {Sarcogyps calvus} in flight, Madhav NP, Madhya Pradesh, India

Tony Heald / Red-headed vulture {Sarcogyps calvus} perching in tree, Bandhavgarh National Park, India 2007