Donald M. Jones / Great Gray Owl (Strix nebulosa), Yaak, Montana

Mark Raycroft / White-tailed Deer (Odocoileus virginianus) buck in snowfall, North America

Paul Bertner / Painted Indonesian Treefrog (Nyctixalus pictus), Bukit Barisan Selatan National Park, Sumatra, Indonesia

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) five month old cub, Bifengxia Panda Base, Sichuan, China

Mark Raycroft / Black Bear (Ursus americanus) peeking from behind tree, North America

Sven Zacek / Female Long-eared owl (Asio otus) peeking from behind a spruce tree, Southern Estonia, June.

Bernard Castelein / Roe Deer (Capreolus capreolus) in woodland, Peerdsbos, Brasschaat, Belgium, June

Cyril Ruoso / Eastern Grey Kangaroo (Macropus giganteus) joey peeking out from its mother's pouch, Australia

Cyril Ruoso / Eastern Grey Kangaroo (Macropus giganteus) joey peeking out of its mother's pouch, Australia

Cyril Ruoso / Chimpanzee (Pan troglodytes) baby playing with keeper, Pandrillus Drill Sanctuary, Nigeria

David Tipling / Brown Hare (Lepus europaeus) peeking over grass, Norfolk, May

Suzi Eszterhas / Chimpanzee (Pan troglodytes) infant age 7 months, peeking out of grooming group, tropical forest, Western Uganda