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

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 bears (Ursus arctos horribilis) fighting, Katamai, 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.

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.

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

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

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.

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) portrait, Lake Clark National Park, Alaska, USA, September.

Visuals Unlimited / Grizzly Bear (Ursus arctos horribilis) roaring head profile, Montana, USA. Captive.

Eric Baccega / Grizzly bear cub (Ursus arctos horribilis) resting in the sedges, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Eric Baccega,Eric Baccega / Female Grizzly bear (Ursus arctos horribilis) standing up in alert and looking around, while feeding on sedge, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Eric Baccega / Female grizly bear (Ursus arctos horribilis) crossing water, followed by her two cubs, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Eric Baccega / On a misty morning, female Grizzly bear (Ursus arctos horribilis) standing up in alert and looking around with her cubs for danger, while feeding on sedges, Khutzeymateen Grizzly Bear Sanctuary, Briti...

Eric Baccega / Juvenile Grizzly bear swimming in the estuary (Ursus arctos horribilis) Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June 2013.

Denis-Huot,Denis-Huot / Grizzly bears (Ursus arctos horribilis) looking for salmon, Brooks river, Katmai national park, Alaska, North America,

Steven Kazlowski / Grizzly bear (Ursus arctos horribilis) young rare blonde (white) bear plays with a young dark coloured bear along the coast of Katmai National Park, Alaskan peninsula, USA

Steven Kazlowski / Grizzly bear (Ursus arctos horribils) walking on snow, 1002 coastal plain, Arctic National Wildlife Refuge, North Slope of Brooks Range, Alaska, USA

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) attempting to catch salmon leaping up rapids, Katmai National Park, Alaska, USA

Loic Poidevin / Salmon landing on head of Grizzly bear (Ursus arctos horribilis) as it is leaping up rapids, Katmai National Park, Alaska, USA

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

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

George Sanker / Grizzly bear (Ursus arctos horribilis) walking through long grass, Yellowstone NP, Wyoming, USA, October

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

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

George Sanker / Grizzly bear (Ursus arctos horribilis) walking, Yellowstone National Park, Wyoming, USA, October

Mary McDonald / Grizzly Bear (Ursus arctos horribilis) male in water. Coastal Katmai National Park, southwest Alaska, USA, August.

Andy Rouse / Grizzly bear (Ursus arctos horribilis) leaping through water chasing salmon, Katmai NP, Alaska, USA, September, (01360399 is a crop of this image)

Andy Rouse / Grizzly bear (Ursus arctos horribilis) leaping through water chasing salmon, Katmai NP, Alaska, USA, September, (crop of image 01360394) Not available for ringtone/wallpaper use.

Andy Rouse / Grizzly bear (Ursus arctos horribilis) fishing in landscape, Katmai NP, Alaska, USA, August

Andy Rouse / Silhouette of Grizzly bear (Ursus arctos horribilis) walking along beach, Katmai NP, Alaska, USA, August