Danny Green / Moose Bull (Alces alces) walking in forest clearing, Denali National Park, USA, September

George Sanker / Moose (Alces alces) bull swimming in water, Baxter State Park, Maine, USA.

Jeff Vanuga / Shiras moose (Alces alces shirasi) bull in rut. Grand Teton National Park, Wyoming, USA, October.

Pal Hermansen / European moose (Alces alces) bulls near houses, Nordland, Norway. July.

Espen Bergersen / European elk / Moose (Alces alces) photograped in midnight sun. Troms, Northern Norway. June

Espen Bergersen / European elk / Moose (Alces alces) feeding close to a house. Troms, Northern Norway. May

Ole Jorgen Liodden / Herd of Moose (Alces alces) following in line in each other's tracks, aerial view, Valdres, Norway, February.

Sven Zacek / Moose (Alces alces) herd on a cold -18 C morning amongst frozen willow bushes, with snow, in Tartumaa, Estonia. January. Highly commended in the Mammals category of the GDT competition 2013.

Sven Zacek,Sven Zacek / Two bull Moose (Alces alces) sizing each other up during the annual rut, after sunset with migrating geese in flight. Western Estonia, September.

Steven Kazlowski / Moose (Alces alces) bull adult swims across a lake in Denali National Park, Interior of Alaska, summer, USA

Steven Kazlowski / Moose (Alces alces) cow suckling her newborn calves. Tony Knowles Coastal Trail, Anchorage, south-central Alaska, May.

Steven Kazlowski / Moose (Alces alces) newborn calves playing in spring vegetation. Tony Knowles Coastal Trail, Anchorage, south-central Alaska.

Steven Kazlowski / Moose (Alces alces) cow with a newborn calf. Tony Knowles Coastal Trail, Anchorage, south-central Alaska, May.

Steven Kazlowski / Moose (Alces alces) cow with a newborn calves grazing on spring grass. Tony Knowles Coastal Trail, Anchorage, south-central Alaska, May.

Steven Kazlowski / Moose (Alces alces) newborn calf kneels to feed on vegetation. Kincaid Park, Anchorage, south-central Alaska, May.

Erlend Haarberg / Male European elk / Moose (Alces alces) in undergrowth, Sarek National Park, Sweden, September

Erlend Haarberg / Bull European elk / Moose (Alces alces) portrait, Sarek National Park, Sweden, September

George Sanker / Moose (Alces alces) jumping a fence, Grand Teton National Park, Wyoming, USA, October

George Sanker / Moose (Alces alces) bull male walking through frosty grass. Grand Teton National Park, Wyoming, USA, October.

Eric Baccega / Moose (Alces alces) head portrait of bull standing in forest clearing, Cap Breton Highlands National Park, Nova Scotia, Canada, September

Eric Baccega / Moose (Alces alces) bull walking in forest clearing, Cap Breton Highlands National Park, Nova Scotia, Canada, September

Eric Baccega / Moose (Alces alces) head portrait of cow, Cap Breton Highlands National Park, Nova Scotia, Canada, September

Patricio Robles Gil / Two male Moose (Alces alces) in lake, one drinking, silhouetted, Gran Teton National Park, Wyoming, USA, October

George Sanker / Moose (Alces alces) bull shaking off water at sunset, Great North Woods, Baxter State Park, Maine, New England, USA, Autumn

George Sanker / Moose (Alces alces) bull walking through woods during a snowstorm, Grand Teton National Park, Wyoming, USA, October

Wild Wonders of Europe / Widstrand / Female European moose (Alces alces) in flowering field, Elk, Morko, Sormland, Sweden, July 2009

Juan Carlos Munoz / Moose (Alces alces) in Taiga woodland, Laponia / Lappland , Finland

Rolf Nussbaumer / Moose (Alces alces) bull in snow storm with aspen trees in background, Grand Teton NP, Wyoming, USA

David Welling / Bull Moose {Alces alces} walking at waters edge. Yellowstone National Park, USA.

Staffan Widstrand / European Moose {Alces alces} shedding velvet from antler, Sarek NP, Lapland, Sweden.

Staffan Widstrand / Moose warning sign on roadside, Sweden.

Asgeir Helgestad / European moose, large 15 ft bull, resting {Alces alces} antlers in velvet, Norway

Asgeir Helgestad / European moose one day-old calf {Alces alces} Norway

Staffan Widstrand / Moose bull rubbing antlers on tree to shed velvet {Alces alces} Sarek NP, Sweden. WWE INDOOR EXHIBITION

Staffan Widstrand / Man aiming gun at Moose {Alces alces} moose hunting The National Ritual Sweden.

Staffan Widstrand / Moose eating velvet from antlers {Alces alces} Sarek NP. Sweden.

Louis Gagnon / Photographer Jose Schell photographing Moose feeding in lake, Gaspe Park, Canada

Jose Schell / Bull moose (Alces alces) feeding in lake. Gaspe Park, Canada

Jose Schell / Bull moose feeding in lake (Alces alces) Gaspe Park, Canada, North America - older moose feed on plants in deeper water

Louis Gagnon / Bull moose (Alces alces) feeding in lake. Gaspe Park Canada

TOM MANGELSEN / Moose by lake, Alaska (Alces alces) Denali NP US

Thomas Lazar / Young moose at river edge (Alces alces) Grand Teton National Park, USA

Jim Brandenburg / Moose (Alces alces andersoni) female looking in car window during winter, the animals lick salt off of cars, Minnesota

Chase Dekker / Moose (Alces alces shirasi) bull flehming in autumn, Grand Teton National Park, Wyoming

Chase Dekker / Moose (Alces alces shirasi) bull flehming in autumn, Grand Teton National Park, Wyoming

Chase Dekker / Moose (Alces alces) bull in tundra, Mount Rundle, Banff National Park, Alberta, Canada

Donald M. Jones / Moose (Alces alces) female crossing highway, central Alaska

Donald M. Jones / Moose (Alces alces) bull in fall at tundra pond, Mount Denali, Denali National Park, Alaska