Sandesh Kadur / Slow motion clip of Amur falcons (Falco amurensis) congregating at roost site during their migration from Siberia to Africa, near Doyang reservoir, Nagaland, India, October.

Sandesh Kadur / Amur falcons (Falco amurensis) congregating during their migration from Siberia to Africa, near Doyang reservoir, Nagaland, India, October.

Sandesh Kadur / Amur falcons (Falco amurensis) congregating during their migration from Siberia to Africa, near Doyang reservoir, Nagaland, India, October.

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

David Pattyn / Golden eagle (Aquila chrysaetos) in flight in front of a vertical rocky mountain side, Gran Paradiso National Park, Aosta Valley, Italy, May

Alan Murphy/ BIA / Barn Owl (Tyto alba) flying with rodent prey, Texas

Alan Murphy/ BIA / Harris' Hawk (Parabuteo unicinctus) flying, Texas

Alan Murphy/ BIA / Great Horned Owl (Bubo virginianus), Texas

Alan Murphy/ BIA / Northern Caracara (Caracara cheriway) pair fighting, Texas

Martin Grimm/ BIA / Eurasian Kestrel (Falco tinnunculus) male flying, Baden-Wurttemberg, Germany

Alan Murphy/ BIA / Bald Eagle (Haliaeetus leucocephalus) fishing, Alaska