The photographer behind a popular image of mice squabbling on a London Underground platform has revealed how he captured the shot after being inspired by a text message from a drunk friend.
The unique portrait of urban wildlife shows the split second combat before one of the mice scurries away triumphant.
The award is now in its 55th year and is organized by the Natural History Museum in London as a way to showcase nature photography and highlight the photographers who capture wildlife.
Staff from the museum created a shortlist of 25 images from the initial 48,000 and the public voted on the overall victor.More news: China virus death toll tops 1,100 as new cases fall
"Sam's image provides a fascinating glimpse into how wildlife functions in a human-dominated environment".
"Every day, hundreds of people watch them box, dance, play the drums and perform other pointless tricks", Gekoski wrote on Instagram after he was shortlisted for the prize in December.
Rowley says he never thought he would win when he re-entered the competition, but that he has been inundated with positive responses. "It's been a lifetime dream to succeed in this competition in this way, with such a relatable photo taken in such an everyday environment in my hometown", he said.
He added: "I hope it shows people the unexpected drama found in the most familiar of urban environments".
Spot The Reindeer, by Francis De Andres, shows white Arctic reindeer nearly hidden against a snowy background in the Norwegian archipelago of Svalbard. The mice's behaviour is sculpted by our daily routine, the transport we use and the food we discard.More news: This is our only image of the sun's north pole
Matching outfits by Michel Zoghzoghi, Lebanon - Michel was in the Pantanal, Brazil photographing jaguars.
There's a load of arctic reindeer in this picture, if you couldn't tell. One afternoon, as he was on the Tres Irmaos River, a mother and her cub crossed right in front of his boat.
Another touching image, Canadian Martin Buzora's portrait of a Kenyan conservation ranger and the baby black rhino he protects, highlights both the kind and cruel impact of humans.
The infant rhinos are cared for at the sanctuary either because of poachers or because their mothers are blind and can not look after them in the wild. But the victor of this year's "Wildlife Photographer of the Year LUMIX People's Choice Award" stunned the contest with something a bit more (extra) ordinary.More news: Samsung accidentally leaks Galaxy Home Mini availability, price