Juergen Freund / Bornean bearded pigs (Sus barbatus) foraging on Teluk Assam Beach. Bako National Park, Sarawak, Borneo, Malaysia

Juergen Freund / Bornean bearded pigs (Sus barbatus) foraging on Teluk Assam Beach. Bako National Park, Sarawak, Borneo, Malaysia

Bernard Castelein / Herd of Wild Gaur (Bos gaurus). Trishna wildlife sanctuary, Tripura, India.

Erlend Haarberg / Two Muskoxen (Ovibos moschatus) standing head to head, Dovrefjell-Sunndalsfjella National Park, Norway, December

Erlend Haarberg / Muskox (Ovibos moschatus) herd grazing in snow, Dovrefjell-Sunndalsfjella National Park, Norway, December 2011

Erlend Haarberg / Red deer (Cervus elaphus) pair mating, another female nearby feeding, Danube-Drava National Park, Hungary, November

Erlend Haarberg / Four Muskoxen (Ovibos moschatus) lying covered in snow after snowstorm, Dovrefjell-Sunndalsfjella National Park, Norway, March

Erlend Haarberg / Muskox (Ovibos moschatus) lying covered in snow after snowstorm, Dovrefjell-Sunndalsfjella National Park, Norway, March

Erlend Haarberg / Muskox (Ovibos moschatus) lying covered in snow, Dovrefjell-Sunndalsfjella National Park, Norway, March

Erlend Haarberg / Muskox (Ovibos moschatus) herd covered in snow, Dovrefjell-Sunndalsfjella National Park, Norway, March

Erlend Haarberg / Muskox (Ovibos moschatus) herd in snow, Dovrefjell-Sunndalsfjella National Park, Norway, March

Erlend Haarberg / Wild Reindeer (Rangifer tarandus) herd in snow, Forollhogna National Park, Sor-Trondelag, Norway, January