Jack Dykinga / Burrowing owl (Athene cunicularia) at sunset, standing on one leg, Marana, Sonoran Desert, Arizona, USA. October.

Bence Mate / Great egret (Ardea alba) fighting, one grabbing the leg of another in snow, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.

Andy Rouse / Gentoo penguin (Pygoscelis papua) walking on beach, Saunders Island, Falkland Islands.

Luciano Candisani / Jacare Caiman (Caiman yacare) standing on bottom of wetland, Pantanal, Brazil

Andy Trowbridge / Arctic Fox (Alopex / Vulpes lagopus) standing on ridge, mist/fog in the background. Dovrefjell National Park, Norway, September.

Alex Hyde / Baboon Spider (Pterinochilus murinus) in aggressive posture, photographed on a white background. Captive, originating from Africa.

Anup Shah / African elephant (Loxodonta africana) close-up. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Anup Shah / African elephant (Loxodonta africana) herd at waterhole with calves seen between adults legs. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Jussi Murtosaari / European brown bear (Ursus arctos arctos) standing on one foot, northern Finland, May.

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cub peering out from behind its mother, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Denis-Huot,Denis-Huot / White-backed Vulture (Gyps Africanus) feeding, Masai-Mara Game Reserve, Kenya

Andy Rouse / Cheetah (Acinonyx jubatus) cub looking around mother's legs Maasai Mara, Kenya, Africa