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

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

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.

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

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

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

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.

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,

Tim Fitzharris / Grizzly Bear (Ursus arctos horribilis) cub in snow, Idaho

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) front and rear tracks in mud, Lake Clark National Park, Alaska

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) chasing salmon, Lake Clark National Park, Alaska

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) cub running through shallow water, Lake Clark National Park, Alaska

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

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

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

Donald M. Jones / Grizzly Bear (Ursus arctos horribilis) eating Sockeye Salmon (Oncorhynchus nerka), Brooks Falls, Alaska

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

George Sanker / Portrait of a Grizzly Bear (Ursus arctos horribilis) against rock. Yellowstone National Park, Wyoming, USA, May.

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

Andy Rouse / Grizzly bear (Ursus arctos horribilis) mother with two cubs, Katmai NP, Alaska, USA, August

Andy Rouse / Two Grizzly bears (Ursus arctos horribilis) male (right) and female fighting over salmon, Katmai NP, Alaska, USA, August

Andy Rouse / Two Grizzly bears (Ursus arctos horribilis) male (right) and female fighting over salmon, Katmai NP, Alaska, USA, August

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

Andy Rouse / Grizzly bears (Ursus arctos horribilis) hunting for salmon on river, Katmai NP, Alaska, USA, August

Andy Rouse / Grizzly bear (Ursus arctos horribilis) shaking dry after fishing for salmon, Katmai NP, Alaska, USA, August

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

Diane McAllister / Coastal Brown bear (Ursus arctos horribilis) female and her cub standing in the long grass. She is looking warily at an approaching boar. Lake Clark National Park, Alaska, USA, July

Andy Rouse / Silhouetted Grizzly Bear (Ursus arctos horribilis) walking. Katmai, Alaska, USA, September.

Andy Rouse / Grizzly Bear (Ursus arctos horribilis) peering into a remote camera. Katmai, Alaska, USA, September.

Andy Rouse / Grizzly Bear (Ursus arctos horribilis) chasing gulls away from his salmon hunting territory. Katmai, Alaska, USA, September.

Andy Rouse / Solitary Grizzly Bear (Ursus arctos horribilis) in expansive mountain landscape. Katmai, Alaska, USA, August.

Andy Rouse / Grizzly Bear (Ursus arctos horribilis) walking through a river with caught salmon against a mountainous landscape as two gulls fly past. Katmai, Alaska, USA, August.

Andy Rouse / Grizzly Bear (Ursus arctos horribilis) with caught salmon, another bear more distant, with mountains backing the scene. Katmai, Alaska, USA, August.

Andy Rouse / Grizzly Bear (Ursus arctos horribilis) mother with two young cubs. Katmai, Alaska, USA, August.

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

Andy Rouse / Grizzly Bear (Ursus arctos horribilis) with a large salmon in its mouth. Katmai, Alaska, USA, August.

Andy Rouse / Grizzly Bear (Ursus arctos horribilis) running through water after salmon. Katmai, Alaska, USA, August.

Andy Rouse / Grizzly Bear (Ursus arctos horribilis) running through water after salmon. Katmai, Alaska, USA, August.

Andy Rouse / Grizzly Bear (Ursus arctos horribilis) chasing through water after salmon. Katmai, Alaska, USA, August.

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

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

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