Andy Rouse / Portrait of a Grizzly Bear (Ursus arctos) cub with paw over face. Katmai, Alaska, USA, September. Not available for ringtone/wallpaper use.

Eric Baccega / Grizzly bear (Ursus arctos horribilis) catching salmon in Brooks river, Katmai National Park, Alaska, USA, July

Mark Raycroft / Grizzly Bear (Ursus arctos horribilis) on road, North America

Mark Raycroft / Grizzly Bear (Ursus arctos horribilis), North America

Mark Raycroft / Grizzly Bear (Ursus arctos horribilis) crossing road, North America

Mark Raycroft / Grizzly Bear (Ursus arctos horribilis), North America

Mark Raycroft / Grizzly Bear (Ursus arctos horribilis), North America

John Shaw / Brown bear (Ursus arctos) searching for clams on tidal mudflat with waterbirds. Lake Clark National Park, Alaska. August.

Sven Zacek / Brown bear (Ursus arctos) in coniferous forest. Ida-Virumaa, Eastern Estonia. September.

Pal Hermansen / Brown bear (Ursus arctos), two showing aggression at night. Finland. August.

Pal Hermansen / Bear (Ursus arctos) silhouetted at night under starry sky. Finland. August.

Chase Dekker / Brown Bear (Ursus arctos) in river, Katmai National Park, Alaska

Sean Crane / Grizzly Bear (Ursus arctos horribilis) with Coho Salmon (Oncorhynchus kisutch) prey, Lake Clark National Park, Alaska

Danny Green / Brown bear (Ursus arctos) in autumnal forest, Finland, September

Danny Green / Brown bear (Ursus arctos) in autumnal forest, Finland, September

Danny Green / Brown Bear (Ursus arctos) in the snow, Finland, April

Donald M. Jones / Brown Bear (Ursus arctos) feeding on dandelions, western Canada

Donald M. Jones / Brown Bear (Ursus arctos) feeding on dandelions, western Canada

Danny Green / Grizzly Bear (Ursus arctos) eating a fish, Lake Clarke National Park, Alaska, August

Philippe Clement / Juvenile European brown bear cub (Ursus arctos arctos) walking in deep snow in winter, Bavarian Forest National Park, Germany, January. Captive.

Philippe Clement / European brown bear (Ursus arctos arctos) cubs suckling from mother in the snow in winter, Bavarian Forest National Park, Germany, January. Captive.

Ingo Arndt / Grizzly Bear / Coastal Brown Bear (Ursus arctos horribilis) mother with two spring cubs, one riding on her back, Lake Clark National Park, Alaska, USA. June.

Ingo Arndt / Grizzly bear (Ursus arctos horribilis) picture taken with a remote camera car, Alaska, July.

Ingo Arndt / Grizzly bear (Ursus arctos horribilis) silhouette, Lake Clark National Park, Alaska

Ingo Arndt / Grizzly bear (Ursus arctos horribilis) silhouette at sunset, Lake Clark National Park, Alaska, USA, July.

Ingo Arndt / Grizzly bear (Ursus arctos horribilis) mother with two cubs catching salmon, Lake Clark National Park, Alaska, USA, September

Ingo Arndt / Grizzly bear (Ursus arctos horribilis) portrait, Lake Clark National Park, Alaska, USA, September.

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) waiting for salmon under moonlit sky, Lake Clark National Park, Alaska, USA, August

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) waiting for salmon at full moon, Lake Clark National Park, Alaska, USA, August

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) two cubs resting, Lake Clark National Park, Alaska, USA, August

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) digging for clams on tidal flats, Lake Clark National Park, Alaska.

Ingo Arndt / Brown / Grizzly Bear (Ursus arctos horribilis) tracks on tidal flats, Alaska, USA

Ingo Arndt / Brown / Grizzly Bear (Ursus arctos horribilis) female with two cubs crossing river, Alaska, USA

Eric Baccega / Female Grizzly bear (Ursus arctos horribilis) looking around and grooming, with four cubs playing nearby, Naknek Lake, Katmai National Park, Alaska, USA, July.

Danny Green / Coastal brown bear (Ursus arctos) fishing, Lake Clarke National Park, Alaska, September

Danny Green / Coastal brown bears (Ursus arctos) resting, Lake Clarke National Park, Alaska, September

Danny Green / Coastal brown bear (Ursus arctos) resting, Lake Clarke National Park, Alaska, September

Danny Green / Coastal brown bear (Ursus arctos) eating a fish, Lake Clarke National Park, Alaska, September

Danny Green / Coastal brown bears (Ursus arctos) fighting, Lake Clarke National Park, Alaska, September

Danny Green / Coastal brown bear cubs (Ursus arctos) resting, Lake Clarke National Park, Alaska, September

Matthias Breiter / Grizzly Bear (Ursus arctos horribilis) yearling cub in temperate rainforest, Tongass National Forest, Alaska

Matthias Breiter / Grizzly Bear (Ursus arctos horribilis) cub in temperate rainforest, Tongass National Forest, Alaska

Matthias Breiter / Grizzly Bear (Ursus arctos horribilis) yearling cubs playing in temperate rainforest, Tongass National Forest, Alaska

Matthias Breiter / Grizzly Bear (Ursus arctos horribilis) with Pink Salmon (Oncorhynchus gorbuscha) prey, Anan Creek, Tongass National Forest, Alaska

Matthias Breiter / Grizzly Bear (Ursus arctos horribilis) juvenile in temperate rainforest, Anan Creek, Tongass National Forest, Alaska

Matthias Breiter / Grizzly Bear (Ursus arctos horribilis) in temperate rainforest, Anan Creek, Tongass National Forest, Alaska

Matthias Breiter / Grizzly Bear (Ursus arctos horribilis) in temperate rainforest, Anan Creek, Tongass National Forest, Alaska

Loic Poidevin / Grizzly bears (Ursus arctos horribilis) fighting in water, Katmai National Park, Alaska, August

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cub playing with mother, Katmai National Park, Alaska, USA, August

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) mother watching cub catching salmon, Katmai National Park, Alaska, USA, August

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) mother and cub in river, Katmai National Park, Alaska, USA, August

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cubs with salmon, Katmai National Park, Alaska, August. Small reproduction only.

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cubs with salmon, Katmai National Park, Alaska, August. Small reproduction only.

Loic Poidevin / Grizzly bears (Ursus arctos horribilis) fighting, Katamai, Alaska, USA, August

Jussi Murtosaari / Brown bear (Ursus arctos) male portrait, Kainuu, Finland, May.

Jussi Murtosaari / Brown bear (Ursus arctos) juvenile playing, hiding behind tree, Kainuu, Finland, May.

Jeff Vanuga / Traffic jam caused by Grizzly bear (Ursus arctos horribilis) mother and cubs crossing road, watched by tourists and photographers, Yellowstone National Park, Wyoming, USA, October 2015.

Donald M. Jones / Grizzly Bear (Ursus arctos horribilis) foraging for salmon in stream, Geographic Harbor, Alaska

Donald M. Jones / Grizzly Bear (Ursus arctos horribilis) foraging for salmon in stream, Geographic Harbor, Alaska

Igor Shpilenok / Young female Kamchatka brown bear (Ursus arctos beringianus) playing with oil drum, Kronotsky Nature Reserve, Kamchatka, Far East Russia. May. These bears can develop addiction to sniffing the aviatio...

Igor Shpilenok / Young female Kamchatka brown bear (Ursus arctos beringianus) playing with oil drum, Kronotsky Nature Reserve, Kamchatka, Far East Russia. May. These bears can develop addiction to sniffing the aviatio...

Sven Zacek / Brown bear (Ursus arctos) at night, near a foggy forest lake, Kuhmo, Finland, April.

Winfried Wisniewski / Brown Bear (Ursus arctos) running through snow, Finland

Suzi Eszterhas / Brown Bear (Ursus arctos) mother and 3-4 month cubs foraging for clams, Katmai National Park, Alaska, USA. June.

Suzi Eszterhas / Brown Bear (Ursus arctos) mother and 3-4 month cubs foraging for clams. Katmai National Park, Alaska, USA, June.

Loic Poidevin / European brown bear (Ursus arctos arctos) Lapland, Finland.

Loic Poidevin / European brown bear (Ursus arctos arctos) mother and young, Lapland, Finland, June.

Danny Green / Coastal brown bear (Ursus arctos) standing on hind legs, Lake Clarke National Park, Alaska, September.

Danny Green / Coastal brown bear (Ursus arctos) and cub, Lake Clarke National Park, Alaska, September.

Danny Green / European brown bear (Ursus arctos) male standing in snow, Finland, April

Danny Green / Coastal brown bear (Ursus arctos), Lake Clarke National Park, Alaska, September.

Danny Green / Coastal brown bear (Ursus arctos) and cub, Lake Clarke National Park, Alaska, September.

Danny Green / Coastal Brown Bear (Ursus arctos), Lake Clarke National Park, Alaska, September.

Danny Green / Coastal brown bear (Ursus arctos) resting, Lake Clarke National Park, Alaska, September.

Ole Jorgen Liodden / European brown bear (Ursus arctos arctos) peering past tree trunks in forest, Finland, June.

Roland Seitre / Brown bear (Ursus arctos) group in zoo, around keepers car, Cabarceno Natural Park, Spain. Captive, occurs in North America and Eurasia.

Andy Rouse / Grizzly bear (Ursus arctos horribilis) charging through river chasing salmon, Alaska, USA. Crop of 01500299.

Andy Rouse / Grizzly bear (Ursus arctos horribilis) cub waking up, Katmai National Park, Alaska, USA, August 2010.

Oliver Scholey / Grizzly bear (Ursus arctos horribilis) female with cub riding on back, Katmai National Park, Alaska, USA, August.

Oliver Scholey / Grizzly bear (Ursus arctos horribilis) Katmai National Park, Alaska, USA, August.

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) cub on mothers back walking on tidal flats, Lake Clark National Park, Alaska

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) mother and cub in grass, Lake Clark National Park, Alaska

Donald M. Jones / Brown Bear (Ursus arctos) walking, Canada

Charlie Summers / Two juvenile Brown Bear siblings (Ursus arctos) look for food on the banks of the Anan Creek lagoon, Alaska, July.

Michel Roggo / Brown bear (Ursus arctos beringianus) fishing for Sockeye salmon in the Ozernaya River, Kamtchatka, Russia, August

Jussi Murtosaari / European brown bear (Ursus arctos arctos) scratching its back, northern Finland, June.

Jussi Murtosaari / European brown bear (Ursus arctos arctos) standing on one foot, northern Finland, May.

Jussi Murtosaari / European brown bear (Ursus arctos arctos) young cub, northern Finland, July.

Jussi Murtosaari / European brown bear (Ursus arctos arctos) two cubs climbing tree, northern Finland, May.

Eric Medard / European brown bear (Ursus arctos arctos) walking through forest at night, taken with infra red remote camera trap, Slovenia, October.

Loic Poidevin / Female Grizzly bear (Ursus arctos horribilis) in water, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Loic Poidevin / Female Grizzly bear (Ursus arctos horribilis) standing up, rear view, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Loic Poidevin / Female Grizzly bear (Ursus arctos horribilis) standing up, with two cubs nearby, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cub peering out from behind its mother, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Juan Carlos Munoz / Brown bear (Ursus arctos) silhouetted at dawn, Karelia. Finland, May.

Laurent Geslin / European brown bear {Ursos arctos} rubbing back against tree trunk in snow, captive, Switzerland, February