Wim van den Heever / Hippopotamus (Hippopotamus amphibius) out of the water, peering around vegetation. Okavango Delta, Botswana.

Ben Hall / Red fox (Vulpes vulpes) peering from behind tree with bluebells in foreground, Cheshire, June.

Bernard Castelein / Roe Deer (Capreolus capreolus) stag peering through vegetation, Peerdsbos, Brasschaat, Belgium, July.

Pete Oxford / Konyak Naga boy peering out of house decorated with buffalo skulls, Konyak Naga headhunting Tribe.Mon district, Nagaland, North East India, October 2014.

Claudio Contreras / Red-bellied Squirrel (Sciurus aureogaster) peering round branch, Mexico City, Mexico, November.

Ole Jorgen Liodden / European brown bear (Ursus arctos arctos) peering past tree trunks in forest, Finland, June.

Aflo / Stray cats, on black and one tabby, peering out of hole in rusty corrugated iron. Chiyoboinari Shrine, Kaizu, Japan.

Markus Varesvuo / Black Woodpecker (Dryocopus martius) peering out from behind a tree. Posio, Finland, February

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cub peering out from behind its mother, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Sven Zacek / Tawny owl (Strix aluco) peering out of its nest hole in tree, Southern Estonia, February.

Martin Willis / Impala (Aepyceros melampus) male with large antlers peering through woodland, Saint Lucia, South Africa

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male head and shoulders portrait, Tangkoko National Park, Sulawesi, Indonesia.