Christophe Courteau / Male BurchellÕs zebra (Equus quagga burchellii) pulling the head of a dead pregnant female that died due to complications whilst giving birth, trying to wake her up, Etosha National Park, Namibia. Par...

Nick Upton / Grey seal (Halichoerus grypus) pup aged one month, rubbing its head with its flipper, yawning and settling down to rest on a sandy beach, Norfolk, England, UK, January.

Thomas Marent / Bonobo (Pan paniscus) staring, native to central Africa

Suzi Eszterhas / Giant Panda (Ailuropoda melanoleuca) six-to-eight month old cub, Bifengxia Panda Base, Sichuan, China

Richard Du Toit / Burchell's Zebra (Equus burchellii) parents tending to foal, Rietvlei Nature Reserve, South Africa

Sebastian Kennerknecht / Mountain Lion (Puma concolor) biologist, Paul Houghtaling, using telemetry to track mother and cubs near houses, Santa Cruz Puma Project, Santa Cruz, Monterey Bay, California

John MacPherson / Reindeer (Rangifer tarandus) fighting, Cairngorms National Park, Scotland, UK, March.

Pete Oxford / Kittens resting on beams. These animals are kepts as pets but sometimes eaten in the Apatani Tribe, Ziro Valley, Himalayan Foothills, Arunachal Pradesh, North East India. November 2014.

Pal Hermansen / European moose (Alces alces) bulls near houses, Nordland, Norway. July.

Staffan Widstrand / Two Svalbard reindeer (Rangifer tarandus platyrhynchus) fighting; antlers shedding velvet; Spitsbergen, Svalbard, Norway, September

Krijn Trimbos / Great crested grebe (Podiceps cristatus) two in territorial fight, The Netherlands, March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) with head low to the water in aggressive display, The Netherlands. March.