Four bear cubs climb up a tree for safety as an alpha male approaches them. Fearing for her cub's lives the mother bear urged them to scramble up the nearest tree trunk while she kept watch on the ground. The scene was captured by photographer Lauri Tammik in woods in north Finland.
A cheeky polar bear sticks out her tongue at Amsterdam Zoo. Photographer Lars van de Goor said: 'I was taking pictures of the animals and noticed this polar bear. I spent half an hour running from left to right, repositioning myself time and time again to get myself into the right position. Then she finally looked straight into my camera and stuck her tongue out.'