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

Claudio Contreras / California condor (Gymnogyps californianus), portrait. California condor recovery program, Sierra de San Pedro Martir National Park, Baja California Peninsula, Mexico.

Claudio Contreras / California condor (Gymnogyps californianus), two peched in tree, adult and juvenile. California condor recovery program, Sierra de San Pedro Martir National Park, Baja California Peninsula, Mexico.

David Pattyn / Bearded vulture (Gypaetus barbatus) in flight over winter landscape with snow, Leukerbad, Vallais, Wallis, Switzerland, January

David Pattyn / Bearded vulture (Gypaetus barbatus) in flight over winter landscape with snow, Leukerbad, Vallais, Wallis, Switzerland, January

Juan Carlos Munoz / Griffon vulture (Gyps fulvus) landing on coast next to flock. Cantabria, Spain, March.

David Perpinan / Group of Griffon vultures (Gyps fulvus) fighting to feed on a dead lamb. Cuenca, Spain, August.

David Perpinan / Group of Griffon vultures (Gyps fulvus) arriving and feeding on a dead lamb, Cuenca, Spain, August.

Ingo Arndt / Bearded Vulture (Gypaetus barbatus) flying, Valais, Switzerland

Ingo Arndt / Bearded Vulture (Gypaetus barbatus) flying in winter, Valais, Switzerland

Ingo Arndt / Bearded Vulture (Gypaetus barbatus) flying low over snow in winter, Valais, Switzerland

Nick Garbutt / Bearded vulture (Gypaetus barbatus) in flight with the out-of-focus moon behind. Ladakh, Himalayas, northern India.