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

Donald M. Jones / Red Squirrel (Tamiasciurus hudsonicus) on pine cone flakes, western Montana

Dave Bevan / Eastern grey squirrel (Sciurus, Carolinensis) entering top of a bird feeder, struggling to get out again, Carmarthenshire, Wales, UK, June.

Terry Whittaker / Red squirrel (Sciurus vulgaris) leaping between Scots pine tree (Pinus sylvestris)s, lands on camera, Black Isle, Ross and Cromarty, Scotland, February.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) feeding, Scotland, UK, September 2011.

Ingo Arndt / Red squirrel feeding on fir cone {Sciurus vulgaris} Germany

Ingo Arndt / Red squirrel portrait {Sciurus vulgaris} Germany

Ingo Arndt / Red squirrel leaping {Sciurus vulgaris} Germany

Ingo Arndt / Red squirrel leaping from tree trunk {Sciurus vulgaris} Germany sequence 2/3

Ingo Arndt / Red squirrel feeding on fir cone {Sciurus vulgaris} Germany

Ingo Arndt / Red squirrel portrait {Sciurus vulgaris}

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) leaping between tree stumps, Cairngorms National Park, Highlands, Scotland, UK. Sequence 1 of 3.