John Chan / Western gulls (Larus occidentalis) attacking an Elegant tern (Thalasseus elegans) with a broken wing, Southern California, USA, April.

Philippe Clement / Territorial Common raven (Corvus corax) on cliff top, tearing out vegetation, Eshaness, Northmavine, Shetland Islands, Scotland, UK, May.

Dave Bevan / Grey plover (Pluvialis squatarola) eating a marine flatworm, Norfolk, England, UK, February.

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...

Jeff Rotman / Hauling in dragger net filled with Haddock (Melanogrammus aeglefinus), Pollock (Pollachius), Dogfish (Squalidae) and Lobster (Nephropidae) Georges Bank off Massachusetts, New England, USA, May 2015. M...

Markus Varesvuo / Black Grouse (Tetrao tetrix) displaying with breath vapor at dawn, Utajarvi, Finland, April

Philippe Clement / Forester dragging tree-trunks from forest with Belgian draft / draught horse (Equus caballus) Belgium. March 2013.

Anup Shah / Olive baboon baby (Papio cynocephalus anubis) 3-6 months tugging at mother, Masai Mara National Reserve, Kenya, March

Jim Brandenburg / Timber Wolf (Canis lupus) trio tugging on White-tailed Deer (Odocoileus virginianus) skin, Minnesota

Ingo Arndt / Puma (Puma concolor) female draggging freshly killed Guanaco (Lama guanicoe). Torres del Paine National Park, Patagonia, Chile. April.

Jack Dykinga / Burrowing owl (Athene cunicularia) chick pestering female by tugging at tail feathers. Marana Arizona, USA. May.

Enrique Lopez-Tapia / Two oxen pulling sled through post-harvest flooded rice field. Rice race during Pacu Jawi, a religious event with parades, ceremonies and weddings. The most powerful cattle are sold for a good price....