Wildlife Photographer of the Year: Portfolio 25

For 50 years, the Wildlife Photographer of the Year competition has championed honest and ethical wildlife photography, while pushing the boundaries of artistic freedom, technical skill and narrative excellence.

This powerful collection of pictures features all the winning photographs from the 2015 competition.

The collections represents the work of many international photographers, both professionals and amateurs.

The photographs are chosen by an international jury for their artistic merit and originality, from categories that together represent a diversity of natural subjects.

The range of styles is also diverse, as is the genre of photography, whether action, macro, underwater, landscape or environmental reportage.

Together this outstanding collection is a reminder of the splendour, drama and variety of life on Earth.

Each stunning photograph is accompanied by an extended caption and there is an introduction by one of the world's most respected nature photographers.