Charlie Summers / Nile crocodile (Crocodylus niloticus) making its way through sand to the Rufiji River, Selous Game Reserve, Tanzania.
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Olga Kamenskaya / Ice fragment on crack in Lake Baikal ice, Siberia, Russia, March.
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Dave Bevan / European eel (Anguilla anguilla) elver trying to migrate up a rock face, before slipping back, Ceredigion, Wales, UK, July.
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George Sanker / White-tailed Deer (Odocoileus virginianus) sliding on ice. Acadia National Park, Maine, USA.
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Frederique Olivier / Wide-angle shot of a group of Emperor penguins (Aptenodytes forsteri) walking, one slips and falls, Adelie Land, Antarctica, January.
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Frederique Olivier / Emperor penguin (Aptenodytes forsteri) leading group of chicks, one following and calling, Adelie Land, Antarctica, January.
Nick Upton / Water vole (Arvicola amphibius) climbing down to the shore of a large pond and eating grass flowers, near Bude, Cornwall, England, UK, June.
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Nick Upton / Slow motion clip of an Oystercatcher (Haematopus ostralegus) struggling to climb up a slope at a coastal roost site as a Shag (Phalacrocorax aristotelis) approaches and flaps its wings, England, UK,...
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SCOTLAND: The Big Picture / Ptarmigan (Lagopus mutus) male sitting after slipping and landing on ice, Cairngorms National Park, Scotland, UK, February.
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Danny Green / RF- Grey headed woodpecker (Picus canus) in flight, Finland. February. (This image may be licensed either as rights managed or royalty free.)
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Andy Rouse / Macaroni Penguin (Eudyptes chrysolophus) sliding down glacier, South Georgia. Crop of 01500168.
