Andy Rouse / Grizzly Bear (Ursus arctos horribilis) male (right) and female fighting in water over salmon. Katmai, Alaska, USA, August.

Staffan Widstrand / Brown Bear portrait {Ursus arctos} Lapland, Finland.

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) salmon fishing in river rapids, Katmai National Park, Alaska, USA

Peter Cairns / naturepl.com / European brown bear (Ursus arctos) with three cubs, Finland, June

Andy Rouse / Grizzly Bear (Ursus arctos horribilis) thrashing a large caught salmon. Katmai, Alaska, USA, August.

Danny Green / Brown Bear (Ursus arctos) portrait in water with wet fur. Finland, Europe, June.

Peter Cairns / naturepl.com / European brown bear (Ursos arctos) reflected in forest pool, Finland

Eric Baccega / Grizzly bears catching migrating salmon, Brooks river, Katmai Alaska {Ursus arctos horribilis}

Wild Wonders of Europe / Cairns / European brown bear (Ursos arctos) backlit by sun, Kuhmo, Finland, July 2009 WWE BOOK

Andy Rouse / Grizzly bear (Ursus arctos horribilis) catching salmon, Katmai NP, Alaska, USA, August

Staffan Widstrand / European Brown bear standing against tree {Ursus arctos} Lapland, Finland

Sergey Gorshkov / Two Kamchatka Brown bears (Ursus arctos beringianus) squabbling beside river, Kamchatka, Far east Russia, July