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...

Martin Grimm/ BIA / Eurasian Black Vulture (Aegypius monachus) nest on mountain slope, Mongolia

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

Pete Oxford / Eurasian Black Vulture (Aegypius monachus) in nest with chick, Gobi Desert, Mongolia

Sergey Gorshkov / Cinereous vulture (Aegypius monachus) resting on rocky outcrop with wings spread, overlooking valley with forest, Land of the Leopard National Park, Russian Far East. Taken with remote camera. January...

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.