Tony Wu/Wildlife Photographer of the Year
"Giant gathering" by Tony Wu, USA. Winner: Behaviour: Mammals.
The winning photo from the 2017 Wildlife Photographer of the Year contest is dark and bloody: A black rhino lies dead on the ground in South Africa's Hluhluwe Imfolozi Game Reserve, its horn brutally sawed off.
Other winning photos showcase the beauty of nature - sharks circle in a column of water, a bear cub wrestles with its mother, and a a congregation of sperm whales gather to socialize.
The winners of the annual contest, which is produced by the Natural History Museum in London, were announced late Tuesday night. They were chosen from more than 50,000 entries submitted from 92 countries around the world. A selection of preview images from the contest were released in September.
You can see the full gallery of winners and finalists on the museum's website, but we've published a selection of some winners and finalists below.