Chimp cuddles and clever coyotes: the 10th BigPicture Natural World photography competition – in pictures

A decade on from its beginnings, the BigPicture Natural World photography competition attracts thousands of entries from around the world. Its aim is to highlight the extraordinary and often fleeting moments of wonder and beauty in nature while bringing attention to ecosystems in need of protection and conservation. Open to professionals and amateurs, contestants enter for the chance to win cash as well as the opportunity to be exhibited at the California Academy of Sciences

• Ten years of Guardian Australia's best photography - in pictures