Markus Varesvuo / Egyptian vulture (Neophron percnopterus) in flight, Oman, November

Christophe Courteau / White backed vulture (Gyps africanus) feeding, Linyanti Game Reserve, Botswana.

Francisco Marquez / Griffon vultures (Gyps fulvus) and European black vultures (Aegypius monachus) feeding on a dead deer, Cabaneros National Park, Montes de Toledo, Spain, May.

Francisco Marquez / Juvenile Lammergeier (Gypaetus barbatus) feeding on a bone in snow, Ordesa y Monte Perdido National Park, Spain, April.

Gerrit Vyn / Mature male California Condor (Gymnogyps californianus) used for the captive breeding program to restore this critically endangered species. Idaho. February.

David Tipling / Bearded vulture (Gypaetus barbatus) adult swallowing leg bone along with hoof, Spanish Pyrenees, July. This bird swallowed five of these leg bones whole, they have the ability to dissolve the bone in...

David Kjaer / Griffon vulture (Gyps fulvus) coming in to land, Spain, July

David Kjaer / Bearded vulture (Gypaetus barbatus)) coming in to land, Spain, July

Neil Aldridge / White-backed vultures (Gyps africanus) feed on a wildebeest carcass, Chobe, Botswana, August.

Bence Mate / Black vulture (Coragyps atratus) squabbling with King vulture (Sarcoramphus papa) Costa Rica.

Bence Mate / Black vulture (Coragyps atratus) face to face with King vulture (Sarcoramphus papa) Costa Rica.

David Pattyn / Bearded vulture (Gypaetus barbatus) flying, Leukerbad, Valais, Switzerland, February