Steven Kazlowski / Two curious young Polar bears (Ursus maritimus), Barter Island, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, October 2011

Gerry Ellis / Chimpanzee (Pan troglodytes) orphans, Larry investigating Daphne's tongue, Ape Action Africa, Mefou Primate Sanctuary, Cameroon

Gary Bell/ Oceanwide / Australian Sea Lion (Neophoca cinerea), Hopkins Island, South Australia, Australia

Anup Shah / Olive Baboon (Papio anubis) curious male investigating camera, Masai Mara, Kenya

Anup Shah / African Elephant (Loxodonta africana) smelling, Masai Mara, Kenya

David Fleetham / Curious Humpback whale calf (Megaptera novaeangliae) during moment away from its mother, Hawaii.

Cyril Ruoso / Chimpanzee (Pan troglodytes) five year old juvenile male named Fanwwaa holding leaf sitting along path, Bossou, Guinea

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.

Willi Rolfes/ BIA / Greylag Goose (Anser anser) chick, Lower Saxony, Germany

Sean Crane / Orangutan (Pongo pygmaeus) juvenile investigating camera, Tanjung Puting National Park, Borneo, Indonesia

Steven Kazlowski / Polar bear (Ursus maritimus) curious young bear approaches over newly forming pack ice during autumn freeze up, Beaufort Sea, off Arctic coast, Alaska