Ingo Arndt / Timber Wolf (Canis lupus) crossing river, Minnesota

Roland Seitre / Spanish / Iberian Lynx (Lynx pardina) cub portrait, part of a breeding and reintroduction program. Captive: critically endangered. Andalusia, Spain, June 2006.

Andrew Parkinson / Fulmar (Fulmarus glacialis) rear view of bird hanging in air over steep cliffs, Shetland Islands, Scotland, UK. HIGHLY COMMENDED - Animals in their environment - Wildlife Photographer of the Year c...

Wild Wonders of Europe / Oxford / Wild Iberian lynx (Lynx pardinus) female emerging from undergrowth, Sierra de Andjar Natural Park, Mediterranean woodland of Sierra Morena, north east Jan Province, Andalusia, Spain, April 2009, Criti...

Wild Wonders of Europe / Cairns / View from Lulep Spadnek looking south towards Tjahkkelij, Nammatj mountain in the distance, Sarek National Park, Laponia World Heritage Site, Lapland, Sweden, September 2008

Wild Wonders of Europe / Cairns / Reindeer (Rangifer tarandus) semi-domesticated, small scale herding by local Sami, Sarek National Park, Laponia World Heritage Site, Lapland, Sweden, September 2008

Theo Allofs / Autumn in the Ogilvie Mountains and boreal forest near the Dempster Highway, Yukon, Canada

Tim Fitzharris / Castle Mountain and boreal forest reflected in lake, Banff National Park, Alberta, Canada

Matthias Breiter / Northern lights or aurora borealis over illuminated tent, boreal forest, North America

Matthias Breiter / Northern lights or aurora borealis over boreal forest, North America

Matthias Breiter / Northern lights or aurora borealis over illuminated tent, boreal forest, North America

Thomas Mangelsen / Boreal forest surrounding lake, Denali National Park and Preserve, Alaska

Tim Fitzharris / Mt Rainier and wildflowers at Reflection lake, Mt Rainier National Park, Washington

Gerry Ellis / Taiga vegetation and pond, Chugach National Forest, Alaska

Gerry Ellis / Stunted Muskeg forest, temperate rainforest, Tongass National Forest, southeast Alaska

Gerry Ellis / Oil pipeline crossing taiga, Alaska

Jim Brandenburg / Canoe bow with autumn trees, Discovery Lake, Superior National Forest, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) trio standing on snowy hillside, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) camouflaged amid snowy trees, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) juvenile in forest, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) howling in light snowfall, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) pair running through deep snow, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) standing in snow, Minnesota

Michael Quinton / Red-necked Grebe (Podiceps grisegena) parent on nest with eggs in boreal pond, Alaska

Jim Brandenburg / Timber Wolf (Canis lupus) under moonlit sky, Northwoods, Minnesota

Michael Quinton / American Beaver (Castor canadensis) slapping water with tail in boreal pond, Alaska

Michael Quinton / American Beaver (Castor canadensis) nibbling on leaf from willow branch in boreal pond, Alaska

Michael Quinton / Caribou (Rangifer tarandus) mother and calf crossing snow field, Alaska

Michio Hoshino / Aurora borealis showing the North Star and Big Dipper, Alaska

Jim Brandenburg / Timber Wolf (Canis lupus) juvenile in forest, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) trio crossing frozen lake, Minnesota

Michio Hoshino / Alaska Moose (Alces alces gigas) with calf, boreal forest, Alaska

Eric Baccega / Vallee du Simmental, Switzerland Habitat of the wild European lynx.

Michael Quinton / Winding creek flowing into the upper Copper River, Alaska

Tim Fitzharris / Pond and boreal forest, Ruby Range near Crested Butte, Colorado

Tim Fitzharris / Boreal forest and Mount Wilson, Banff National Park, Alberta, Canada

Kevin Schafer / Vermillion River, Kootenay National Park, British Columbia, Canada

Bryan and Cherry Alexander / Autumn colour on the banks of the River Shirta as it cuts through boreal forest, Krasnoselkup, Yamal, Western Siberia, Russia

Bryan and Cherry Alexander / Bunch grass (Calamagrostis arundinacea) and Silver birch trees backlit by the autumn sun in boreal forest, Krasnoselkup, Yamal, Western Siberia, Russia

Bryan and Cherry Alexander / Boreal Forest trees in autumn colour, aspen, birch and willow, reflected in the River Taz, Krasnoselkup, Yamal, Western Siberia, Russia

Bryan and Cherry Alexander / Boreal forest (taiga) in winter with snow covered trees near Ratta, Krasnoselkup, Yamal, Western Siberia, Russia 2012

Bryan and Cherry Alexander / Boreal Forest trees in autumn colour, aspen, birch and willow, reflected in the River Taz, Krasnoselkup, Yamal, Western Siberia, Russia

Bryan and Cherry Alexander / Firewood stacked outside a 'Poymot' (traditional Selkup turf hut) at a winter hunting camp in the forest near Ratta, Krasnoselkup, Yamal, Western Siberia, Russia 2012

Bryan and Cherry Alexander / Aerial view of boreal forest / taiga in winter in the Taz River Basin, Krasnoselkup, Yamal, Western Siberia, Russia 2012

Ingo Arndt / Coastal area with salt marsh and boreal forest, Cook Inlet, Alaska

Ingo Arndt / Bog in boreal forest, Lake Clark National Park, Alaska

Ingo Arndt / Boreal forest during winter with moon near Fairbanks, Alaska

Ingo Arndt / Timber Wolf (Canis lupus) at river, Minnesota

Peter Cairns / Autumnal boreal forest, Rondane, Norway September 2007

Hiroya Minakuchi / Humpback Whale (Megaptera novaeangliae) diving, Alaska

Hiroya Minakuchi / Spruce (Picea sp) forest in mist, Alaska

Roger Powell / Fulmar (Fulmarus glacialis) at its nest site on rocky ledge surrounded by Thrift, Great Saltee Island, Wexford, Republic of Ireland, June

Edwin Giesbers / Lynx (Lynx lynx) resting on rock, captive

Pete Oxford / Mountain Reindeer (Rangifer tarandus tarandus) with Dukha man in taiga, Mongolia

Matthias Breiter / Mountains above Coral Creek and Cline River, Jasper National Park, Alberta, Canada

Matthias Breiter / Taiga forest and Mount Sanford, Wrangell-St. Elias National Park, Alaska

Matthias Breiter / Spruce (Picea sp) forest along Akwe River, Tongass National Forest, Yakutat, Alaska

Matthias Breiter / Spruce (Picea sp) forest, Tongass National Forest, Yakutat, Alaska

Matthias Breiter / Spruce (Picea sp) forest along Akwe River and coast, Tongass National Forest, Yakutat, Alaska

Matthias Breiter / Boreal forest and Situk River, Tongass National Forest, Yakutat, Alaska

Matthias Breiter / Stream and boreal forest, Tongass National Forest, Yakutat, Alaska

Matthias Breiter / Lake and taiga, Tongass National Forest, Yakutat, Alaska

Klaus Echle / Portrait of Lynx (Lynx lynx) in undergrowth. The Black Forest, Germany, October. Captive

Klaus Echle / Lynx (Lynx lynx) in snow-bound woodland. The Black Forest, Germany, January. Captive

Klaus Echle / Lynx (Lynx lynx) looking around a tree trunk. Hannau, Germany, September. Captive

Klaus Echle / Lynx (Lynx lynx) portrait through leaves. The Black Forest, Germany, September. Captive

Klaus Echle / Portrait of a Lynx (Lynx lynx). Hanau, Germany, September. Captive

Klaus Echle / Lynx (Lynx lynx) sitting sphynx-line in softly lit woodland floor. Hanau, Germany, September. Captive

Klaus Echle / Lynx (Lynx lynx) yawning and relaxing on a mossy rock. Hanau, Germany, September. Captive

Klaus Echle / Lynx (Lynx lynx) climbing a tree. The Black Forest, Hanau, Germany, September. Captive

Yva Momatiuk & John Eastcott / Boreal forest with thick moss and lichens on forest floor, British Columbia, Canada

Peter Cairns / Domesticated European Grey Wolf (Canis lupus) in autumnal boreal forest. Norway, September.

Peter Cairns / Eurasian Lynx (Lynx lynx) kitten in autumnal boreal forest. Captive. Norway, September.

Peter Cairns / Eurasian Lynx (Lynx lynx) with spotted coat walking along a tree branch. Captive. Norway, September.

Peter Cairns / Eurasian Lynx (Lynx lynx) with a spotted coat climbing tree. Norway, September.

Steve Gettle / Boreal Chickadee (Parus hudsonicus), Sax-Zim Bog, Minnesota

Tim Fitzharris / Boreal forest along lake edge, Nutzotin Mountains, Alaska

Yva Momatiuk & John Eastcott / Black Spruce (Picea mariana) trees covered with snow in boreal forest, Alaska

Donald M. Jones / Snowshoe Hare (Lepus americanus) feeding on fallen Douglas Fir (Pseudotsuga menziesii) tree, northwest Montana

Donald M. Jones / Snowshoe Hare (Lepus americanus) feeding on fallen Douglas Fir (Pseudotsuga menziesii) tree, northwest Montana

Donald M. Jones / Blue Grouse (Dendragapus obscurus) male in high elevation forest, western Montana

Donald M. Jones / Black Bear (Ursus americanus) male, Alberta, Canada

Eric Baccega / Black bear (Ursus americanus) in Boreal forest, Alaska, USA

Jim Brandenburg / Double rainbow over Sunwapta Falls near Jasper National Park, Alberta, Canada

Sven Zacek / Hollow rotten tree with bracket fungi, woodland habitat, Estonia

Sven Zacek / Ural owl ( Strix uralensis) sleeping perched in coniferous tree, Estonia, Winter

Sven Zacek / Large male Brown bear (Ursus arctos) in woodland habitat, Estonia

Sumio Harada / Mule Deer (Odocoileus hemionus) bucks, Glacier National Park, Montana

Matthias Breiter / Moon setting over Mount McDonell near Haines, Alaska

Tim Fitzharris / Mount Rainier, Mount Rainier National Park, Washington

Tim Fitzharris / Mount Rainier, Mount Rainier National Park, Washington

Tim Fitzharris / Sawtooth Range and Stanley Lake Creek, Idaho

Tim Fitzharris / Kendall Mountain near Silverton, Colorado

Wild Wonders of Europe / Cairns / Bog woodland with mixed boreal species, Sarek National Park, Laponia World Heritage Site, Lapland, Sweden, September 2008

Wild Wonders of Europe / Cairns / Reindeer (Rangifer tarandus) portrait, semi-domesticated, small scale herding by local Sami, Sarek National Park, Laponia World Heritage Site, Lapland, Sweden, September 2008