Pal Hermansen / Red squirrel (Sciurus vulgaris) in tree with conifer cone in mouth. Akershus, Norway. April.

George Sanker / American red squirrel (Tamiasciurus hudsonicus) on tree trunk drinking in a beaver pond early in the morning. Acadia National Park, Maine, USA. May.

Klein & Hubert / European ground squirrel / Souslik (Spermophius citellus) standing in a carpet of flowers of Stork's bill (Erodium cicutarium) and holding in his paws a Poppy (Papaver rhoeas) flower before eating it,...

Neil Anderson / Red squirrel (Sciurus vulgaris), two curled up asleep in drey inside nest box. Nest of lichen and Pine needles. Highlands, Scotland, UK. Medium repro only.

SCOTLAND: The Big Picture / RF - Red Squirrel (Sciurus vulgaris), at woodland pond , Scotland, UK.April (This image may be licensed either as rights managed or royalty free.)

SCOTLAND: The Big Picture / Red squirrel, (Sciurus vulgaris), silhouetted on stump at dawn, Scotland, UK.March

SCOTLAND: The Big Picture / Red squirrel, (Sciurus vulgaris), two backlit on pine branch, Cairngorms National Park, Scotland, UK.May

SCOTLAND: The Big Picture / Red squirrel, (Sciurus vulgaris), three animals backlit on pine branch, Cairngorms National Park, Scotland, UK.May

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris), at woodland pool, Cairngorms National Park, Scotland, UK.November

Paul Hobson / Red squirrel (Sciurus vulgaris) jumping towards camera. Scotland, UK. February.

Erlend Haarberg / Red squirrel (Sciurus vulgaris) hiding in a tree trunk, Klaebu, Norway, September.

Sergey Gorshkov / Northern goshawk (Accipiter gentilis) flying with squirrel prey, Finland . March

Sergey Gorshkov / Northern goshawks (Accipiter gentilis) fighting over squirrel carcass, Finland, March.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) climbing down Scots pine tree, just tail visible. Cairngorms National Park, Highlands, Scotland. August.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) male standing upright in alert pose,Cairngorms National Park, Highlands, Scotland, UK, May 2016.

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) male standing alert, Cairngorms National Park, Highlands, Scotland, UK, May.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) climbing tree trunk with autumn leaves, Highlands, Scotland, October 2015.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) on forest floor with autumn leaves Highlands, Scotland, UK, October.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) silhouetted against autumnal woodland, Highlands, Scotland, UK, October. Winner of the Seasons Category of the British Wildlife Photography Awards (BWPA) competition 20...

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) in summer coat on Scots pine tree trunk, Highlands, Scotland

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) amongst Bell heather (Erica cinerea) Cairngorms National Park, Highlands, Scotland, August.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) with autumn colours, Cairngorms National Park, Highlands, Scotland, UK. October.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) on old pine tree, looking through autumn birch foliage, Scotland, UK, October. Highly Commended in the Habitat Category of the British Wildlife Photography Awards (BWPA...

SCOTLAND: The Big Picture / Red Squirrel (sciurus vulgaris) leaping between tree stumps, backlit in morning light .Cairngorms National Park, Scotland, UK, March.

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) reaching up and standing on hind legs. Cairngorms National Park, Highlands, Scotland, UK, March.

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) standing alert amongst heather, Cairngorms National Park, Highlands, Scotland, UK, March.

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) burying food, Highlands, Scotland, UK, October.

SCOTLAND: The Big Picture / Curious Red Squirrel (Sciurus vulgaris) peering at camera from garden fence, Cairngorms National Park, Highlands, Scotland, UK, September 2016. Highly commended in the Animal Portraits category of the...

SCOTLAND: The Big Picture / Curious Red Squirrel (Sciurus vulgaris) peering at camera from garden fence, Cairngorms National Park, Highlands, Scotland, UK, September 2016.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) sitting on an old giant gnarled Oak tree. Highlands, Scotland, UK, January. Highly Commended in the Habitat Category of the British Wildlife Photography Awards (BWPA) C...

SCOTLAND: The Big Picture / Silhouetted Red Squirrel (Sciurus vulgaris) jumping between tree stumps. Cairngorms National Park, Highlands, Scotland, UK, August.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) descending trunk of Oak tree, Cairngorms National Park, Highlands, Scotland, UK, October 2015.

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) close-up portrait of red squirrel sniffing. Cairngorms National Park, Highlands, Scotland, UK, March.

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) in Scots pine forest, Cairngorms National Park, Highlands, Scotland, UK, April.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) in Scots pine forest, Cairngorms National Park, Highlands, Scotland, UK, April.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) portrait, Highlands, Scotland, UK, April.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) close-up climbing down tree, Cairngorms National Park, Highlands, Scotland, UK, April.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) peering round pine tree, Cairngorms National Park, Highlands, Scotland, UK, April.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) in Scots pine forest, Cairngorms National Park, Highlands, Scotland, UK, April.

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) disappearing behind tree, tail visible, Cairngorms National Park, Highlands, Scotland, UK, August.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) sitting on Chicken of the Woods fungus (Laetiporus), Cairngorms National Park, Highlands, Scotland, UK, June.

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) nibbling on oak buds, Cairngorms National Park, Highlands, Scotland, UK, January.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) testing nut. Cairngorms National Park, Highlands, Scotland, UK, November.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) in winter in early morning light. Cairngorms National Park, Highlands, Scotland, UK

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) standing upright in alert pose. Cairngorms National Park, Scotland, UK, March.

SCOTLAND: The Big Picture / Red Squirrel (sciurus vulgaris) foraging in pine tree, Cairngorms National Park, Highlands, Scotland, UK, February,

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) leaping between pine trees in forest in late afternoon light, Cairngorms National Park, Highlands, Scotland, UK, April.

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) foraging amongst heather as first light hits forest floor, Cairngorms National Park, Highlands, Scotland, UK, March.