Wim van den Heever / African Wild dogs or Cape hunting dogs (Lycaon pictus) at close range taken from ground level, Zimanga Private Game Reserve, South Africa.

Tony Heald / African Wild Dog (Lycaon pictus) pack passing infront of large African elephant (Loxodonta africana) Mana Pools National Park, Zimbabwe October 2012

Jeff Rotman / Whitetip reef sharks (Triaenodon obesus) pack silhouetted following scent trail in water column, Cocos Island, Costa Rica, Pacific Ocean

Chadden Hunter / Aerial view of Timber wolves (Canis lupus) attacking a Bison calf (Bison bison) on the Arctic circle in Northern Canada. Taken on location for BBC Frozen Planet series, 2009

Chadden Hunter / Aerial view of hunting pack of Timber wolves (Canis lupus) in Arctic circle in Northern Canada, Taken on location for BBC Frozen Planet series, 2009

Anup Shah / Pack of Black-backed jackals (Canis mesomelas) scavenging on the remains of a carcass left by African lions ( Panthera leo) Masai Mara National Reserve, Kenya. March.

Jeff Rotman / Lobsterman packs American lobsters (Homarus americanus) at end of day from lobster pots, Yarmouth Maine USA October. Model released.

Denis-Huot / Pack of African wild dogs (Lycaon pictus) playing, Motswari Game Reserve, South Africa.

Neil Aldridge / African wild dog (Lycaon pictus) staring at another animal along a fenceline on Venetia Limpopo Reserve, Limpopo Province, South Africa.. In South Africa, predator-proof fences have been responsible f...

Wim van den Heever / African Wild dogs or Cape hunting dogs (Lycaon pictus) at close range taken from ground level, Zimanga Private Game Reserve, South Africa.

Wim van den Heever / African Wild dogs or Cape hunting dogs (Lycaon pictus) at close range taken from ground level, Zimanga Private Game Reserve, South Africa.

Pal Hermansen / View from aboard ice-breaker 'Kapitan Dranitsyn' to land, Franz Josef Land, Russia 2004.