There are just a few hours left to enter National Geographic's 2017 Nature Photographer of the Year contest. Entries close at 12pm EST (5pm GMT) on Friday 17 November 2017. Photographers around the world are invited to submit their work at in any or all of four categories: Wildlife, Landscape, Underwater and Aerial.

The grand prize winner will receive $10,000 (about £7,500), publication in National Geographic Magazine and a feature on National Geographic's Instagram account, @natgeo. The winners will be announced in December 2017. For details and official contest rules, please visit

IBTimes UK showcases some of the most spectacular entries submitted recently. See more at