Bernard Castelein / Wilson's phalarope (Phalaropus tricolor) flock on water, Sajama National Park, altiplano, Bolivia September

Bernard Castelein / Wilson's phalarope (Phalaropus tricolor) flock on water, Sajama National Park, altiplano, Bolivia September

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.

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

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

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.

Shattil & Rozinski / Juvenile American black bear (Ursus americanus), brown phase, looking for food in a car, Denver, Colorado, USA, July.

Shattil & Rozinski / Juvenile American black bear (Ursus americanus), brown phase, standing upright and leaning on a car, Denver, Colorado, USA, July.

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

Laurent Geslin / European brown bear {Ursos arctos} lying in snow holding foot, captive, Switzerland, February

Laurent Geslin / European brown bear + cubs scavenging in rubbish bins {Ursus arctos} Brasov, Romania

Andy Rouse / European Brown Bear (Ursus arctos arctos) mother and young cub. Finland, Europe, June.

Peter Cairns / Young female European Brown Bear (Ursus arctos) in woodland. Martinselkonen, Suomassalmi, Finland, June.

Edwin Giesbers / European Brown Bear (Ursus arctos) head portrait, with mouth open, captive.

Edwin Giesbers / European Brown Bear (Ursus arctos) head portrait, with mouth open, captive.

Edwin Giesbers / Big close up of the eyes of a European Brown bear (Ursus arctos) captive

Chris Gomersall / Two European brown bear (Ursus arctos) cubs climbing pine tree in taiga forest, Martinselkonen, Finland, June

Chris Gomersall / European brown bear (Ursus arctos) cub climbing pine tree, Finland, July

Philippe Clement / European Brown bear (Ursus arctos) female climbed tree and is looking down at male bear, Bavarian Forest NP, Germany, Captive

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

Peter Cairns / naturepl.com / European brown bear (Ursus arctos) in boreal forest, Finland, June

Wild Wonders of Europe / Cairns / European brown bear (Ursos arctos) resting after swimming in lake, Kuhmo, Finland, July 2009

Wild Wonders of Europe / Cairns / European brown bear (Ursos arctos) Kuhmo, Finland, July 2009

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

Wild Wonders of Europe / Widstrand / European brown bear (Ursus arctos) walking, Kuhmo, Finland, July 2009

Wild Wonders of Europe / Widstrand / European brown bear (Ursus arctos) standing on hind legs with water dipping from paws, Kuhmo, Finland, July 2009

Wild Wonders of Europe / Widstrand / European brown bear (Ursus arctos) Kuhmo, Finland, July 2009

Wild Wonders of Europe / Widstrand / European grey wolf (Canis lupus) carrying prey interacting with a European Brown bear (Ursus arctos) Kuhmo, Finland, July 2009

Wild Wonders of Europe / Widstra / European grey wolf (Canis lupus) interacting with a European brown bear (Ursus arctos) Kuhmo, Finland, July 2009. WWE INDOOR EXHIBITION

Wild Wonders of Europe / Widstrand / European brown bear (Ursus arctos) walking, Kuhmo, Finland, July 2009

Wild Wonders of Europe / Widstrand / European brown bear (Ursus arctos) Kuhmo, Finland, July 2009

Wild Wonders of Europe / Widstrand / Two European brown bears (Ursus arctos) fighting, Kuhmo, Finland, July 2009

Wild Wonders of Europe / Widstrand / European brown bear (Ursus arctos) walking, Kuhmo, Finland, July 2009

Wild Wonders of Europe / D'Amicis / Female European brown bear (Ursus arctos) with two yearling cubs emerging from Dwarf pines (Pinus mugo) Western Tatras, Carpathian Mountains, Slovakia, June 2009

Wild Wonders of Europe / D'Amicis / Female European brown bear (Ursus arctos) with two yearling cubs walking down steep slope, Western Tatras, Carpathian Mountains, Slovakia, June 2009

Wild Wonders of Europe / D'Amicis / European brown bear (Ursus arctos) solitary female peering from behind Dwarf mountain pines (Pinus mugo) in mountain meadow, Western Tatras, Carpathian Mountains, Slovakia, June 2009

Wild Wonders of Europe / D'Amicis / Female European brown bear (Ursus arctos) with two yearling cubs feeding amongst Dwarf pines (Pinus mugo) Western Tatras, Carpathian Mountains, Slovakia, June 2009

Wild Wonders of Europe / D'Amicis / Female European brown bear (Ursus arctos) with two yearling cubs walking on snow field on mountain ridge, Western Tatras, Carpathian Mountains, Slovakia, June 2009

Wild Wonders of Europe / Dörr / European brown bear (Ursus arctos) in tree, captive, Private Bear Park, near Brasov, Romania, October 2008

Wild Wonders of Europe / Dörr / European brown bear (Ursus arctos) in tree, captive, Private Bear Park, near Brasov, Romania, October 2008

Wild Wonders of Europe / Dörr / European brown bear (Ursus arctos) looking down from tree, captive, Private Bear Park, near Brasov, Romania, October 2008

Wild Wonders of Europe / Widstrand / Wild Eurasian brown bear (Ursus arctos) and a European Grey wolf (Canis lupus) at waters edge, Kuhmo, Finland, July 2008

Eric Baccega / Two European brown bears {Ursus arctos} play fighting in the snow. Bayerisher wald NP, Germany. Captive

Pete Cairns / European brown bear (Ursos arctos) in captivity standing up against cage wire. Nord-Trondelag, Norway.

Staffan Widstrand / European Brown Bear in woodland {Ursus arctos} Lapland, Finland.

Staffan Widstrand / European Brown bear paw on tree trunk {Ursus arctos} Lapland Finland.

Staffan Widstrand / European Brown Bear, {Ursus arctos} captive, Sweden.

Staffan Widstrand / Female European Brown bear with cubs following {Ursus arctos} Lapland Finland.

Staffan Widstrand / European brown bear {Ursus arctos} portrait Lapland, Finland

Staffan Widstrand / European brown bear walking in snow {Ursus arctos} Halsingland, Sweden.

Staffan Widstrand / Female European Brown bear with cubs following behind {Ursus arctos} Lapland Finland.

Konrad Wothe / Brown Bear (Ursus arctos) climbing tree, Europe

Konrad Wothe / Brown Bear (Ursus arctos) sitting upright, Germany

Pete Cairns / European brown bear {Ursus arctos} Finland

Asgeir Helgestad / European Brown bear suckling cubs {Ursus arctos} Finland

Asgeir Helgestad / European Brown bear in pine forest {Ursus arctos} Finland

Bruno D'Amicis / Marsican / Apennine brown bear (Ursus arctos marsicanus) walking on a trail through old-growth Beech (Fagus sylvatica) forest trees. Critically endangered subspecies. Abruzzo, Lazio and Molise Nationa...

Bruno D'Amicis / Marsican / Apennine brown bear (Ursus arctos marsicanus) claw marks on Beech (Fagus sylvatica) tree bark in old growth beech forest. Abruzzo, Lazio and Molise National Park / Parco Nazionale d'Abr...

David Perpinan / Vaccination of a male Brown bear (Ursus arctos) anaesthetised in Slovenia for a reintroduction project in the Pyrenees, Jelen Reserve, Slovenia, June, 2016.

David Perpinan / Dental examination of a male Brown bear (Ursus arctos) anaesthetised in Slovenia for a reintroduction project in the Pyrenees, Jelen Reserve, Slovenia, June, 2016.

David Perpinan / Vets attaching an ear transmitter to a male Brown bear (Ursus arctos) anaesthetised in Slovenia for a reintroduction project in the Pyrenees, Jelen Reserve, Slovenia, June, 2016.

Franco Banfi / European brown bear (Ursus arctos) sitting, Sneznik forest, Slovenia. June.

Franco Banfi / European brown bear (Ursus arctos), Sneznik forest, Slovenia. June.

Franco Banfi / European brown bear (Ursus arctos), Sneznik forest, Slovenia. June.

Franco Banfi / European brown bear (Ursus arctos) amongst tree trunks, Sneznik forest, Slovenia. June.

Franco Banfi / European brown bear (Ursus arctos) amongst tree trunks, Sneznik forest, Slovenia. June.

Franco Banfi / European brown bear (Ursus arctos), alpha male in Karst forest, Notranjska, Slovenia.

Franco Banfi / European brown bear (Ursus arctos), alpha male in Karst forest, Notranjska, Slovenia.

Franco Banfi / European brown bear (Ursus arctos), alpha male in the Karst forest, Notranjska, Slovenia.

Franco Banfi / European brown bear (Ursus arctos), juvenile standing on rocks in the Karst forest, Notranjska, Slovenia.

Andres M. Dominguez / Bee hives kept in walled area to deter bears, Muniellos National Park, Asturias, Spain. October

Andy Trowbridge / European brown bear (Ursus arctos arctos), large male at rest/sitting on forest floor. Portrait. Kajaani, Finland. June.

Edwin Giesbers / Eurasian brown bear (Ursus arctos arctos) scratching, Germany, July. Captive.

Edwin Giesbers / Eurasian brown bear (Ursus arctos arctos) scratching, Germany, July. Captive.

Edwin Giesbers / Eurasian brown bear (Ursus arctos arctos) scratching, Germany, July. Captive.

Edwin Giesbers / Eurasian brown bear (Ursus arctos arctos) scratching, Germany, July. Captive.

Philippe Clement / European brown bear cub (Ursus arctos arctos) playing at den entrance in the snow in winter, Bavarian Forest National Park, Germany, January. Captive.

Philippe Clement / European brown bear cub (Ursus arctos arctos) playing at den entrance in the snow in winter, Bavarian Forest National Park, Germany, January. Captive.

Philippe Clement / European brown bear cub (Ursus arctos arctos) playing with twigs in the snow in winter, Bavarian Forest National Park, Germany, January. Captive.

Philippe Clement / Two European brown bear cubs (Ursus arctos arctos) competing over food scraps outside den in the snow in winter, Bavarian Forest National Park, Germany, January. Captive.

Philippe Clement / Two European brown bear cubs (Ursus arctos arctos) competing over food scraps outside den in the snow in winter, Bavarian Forest National Park, Germany, January. Captive.

Philippe Clement / European brown bear cub (Ursus arctos arctos) playing with bone in the snow in winter, Bavarian Forest National Park, Germany, January. Captive.

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

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

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

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

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

Philippe Clement / European brown bear cub (Ursus arctos arctos) feeding in the 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.

Philippe Clement / Two European brown bear (Ursus arctos) cubs climbing over a fallen tree trunk, Bavarian Forest National Park, Germany, May. Captive.

Philippe Clement / Female Brown bear (Ursus arctos) with two cubs feeding on Rowan (Sorbus aucuparia) leaves in woodland, Bavarian Forest National Park, Germany, May. Captive.