Danny Green / Bison (Bison bison) herd walking in line in snow, Yellowstone National Park, Wyoming, USA, February

Inaki Relanzon / Gentoo penguins (Pygoscelis papua) on the beach at sunset, Sea Lion Island, Falkland Islands.

Ann & Steve Toon / Cape buffalo (Syncerus caffer) drinking at waterhole at night, Zimanga private game reserve, KwaZulu-Natal, South Africa, September

Ann & Steve Toon / Plains zebra (Equus quagga) drinking at waterhole at night, Zimanga private game reserve, KwaZulu-Natal, South Africa, September

Alex Mustard / Grey seal (Halichoerus grypus) young female opens her mouth and blows bubbles through her nose playfully while she looks up from the seabed. Lundy Island, Devon, UK, Bristol Channel. August. Highly co...

Alex Mustard / Grey seal (Halichoerus grypus) split level view of young investigating camera lens, Lundy Island, Devon, UK, Bristol Channel, August

Alex Mustard / Tompot blenny (Parablennius gattorugine) portrait, Swanage Pier, Swanage, Dorset, UK, English Channel, August

Markus Varesvuo / Hawk owl (Surnia ulula) takingn off from powder snow, possibly with prey in talons, Kuusamo Finland February

Markus Varesvuo / Black stork (Ciconia nigra) Hungary May

Markus Varesvuo / Cormorant (Phalacrocorax carbo) swallowing perch prey, Hungary, January

Sam Hobson / Red fox (Vulpes vulpes) vixen in front of Clifton Suspension Bridge at night. Avon Gorge, Bristol, UK. March 2016.

Claudio Contreras / American crocodile (Crocodylus acutus) split level with animal resting at surface in shallow water over seagrass bed, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico