Bloodthirsty by Thomas P. Peschak, Germany/South Africa — winner, Behaviour: birds. When rations run short on Wolf Island, in the remote northern Galápagos, the sharp-beaked ground finches become vampires. Their sitting targets are Nazca boobies and other large birds. The finches rely on a scant diet of seeds and insects, which regularly dries up, so they drink blood to survive. ‘I’ve seen more than half a dozen finches drinking from a single Nazca booby,’ says Tom. Rather than leave their nests the boobies tolerate the vampires, and the blood loss doesn’t seem to cause permanent harm. (Photo by Thomas P. Peschak/2018 Wildlife Photographer of the Year)

A ballet student from the Kibera based Project Elimu poses ahead of a public show in Kibera on August 14, 2024. Project Elimu, a community driven non profit organization, provides afterschool art, sport education programs for young people age 3 to 22. During school holidays the center holds street perfomances to encourage more students to join the dance center. Kibera is the largest slum in Nairobi, one of the largest in Africa. (Photo by Gordwin Odhiambo/AFP Photo)

The images of U.S. Democratic presidential candidate Hillary Clinton (L) and Republican Presidential candidate Donald Trump are seen painted on decorative pumpkins created by artist John Kettman in LaSalle, Illinois, U.S., June 8, 2016. (Photo by Jim Young/Reuters)

A tomtit bird flies past a squirrel running on a fence after a snowfall in a park in Almaty, Kazakhstan, January 12, 2016. (Photo by Shamil Zhumatov/Reuters)

Students brave high winds and rain on Blackpool promenade as Britain prepares for high winds over the next two days on October 20, 2014 in Blackpool, England. (Photo by Christopher Furlong/Getty Images)

Photographer holding digital camera during photoshoot of fashion model. (Photo by grinvalds/Getty Images)

Close up of a couple, with the woman holding the man's knee, underneath a table. (Photo by Peter Dazeley/Getty Images)