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 sandstorm hits the city of Zhangye in Gansu province, China on November 27, 2018. (Photo by Reuters/China Stringer Network)

Tourists take photos from a panoramic viewing deck on Victoria Peak in Hong Kong, China, 26 January 2019. Hong Kong has been ranked the world's freest economy by the Heritage Foundation, a conservative research and educational institution based in Washington, for the 25th consecutive year, but the researchers also said the judiciary had become less effective. (Photo by Jerome Favre/EPA/EFE)

Women breastfeed their babies at an event promoting the freedom of mothers to breastfeed in public, during World Breastfeeding Week, at the Village Museum in Bucharest Romania, Saturday, August 6, 2016. (Photo by Andreea Alexandru/AP Photo)

Traffic lights feature illustrations of a homosexual couple in downtown Frankfurt Main, Germany, 18 July 2019. An annual gay pride parade will take place on 20 July 2019 in Frankfurt to commemorate Christopher Street Day (CSD). The event commemorates the riots that erupted following a police raid in 1969 at a gay bar on Christopher Street in Greenwich Village, New York City. (Photo by Armando Babani/EPA/EFE)

Chile's Mary Dee Vargas (L) reacts after defeating Brazil's Larissa Farias compete in their Judo Women's –48 kg Bronze Medal contest during the Lima 2019 Pan-American Games in Lima on August 8, 2019. (Photo by Guadalupe Pardo/Reuters)

(L-R) Alex Pereira of Brazil punches Israel Adesanya of Nigeria in the UFC middleweight championship bout during the UFC 281 event at Madison Square Garden on November 12, 2022 in New York City. (Photo by Jeff Bottari/Zuffa LLC)

Sydney Peng, 19, who has been dancing for eleven years, performs a Chinese opera dance in celebration of the Lunar New Year, in the rotunda of the Mall of America in Bloomington, Minn., on Sunday, January 22, 2023. (Photo by Richard Tsong-Taatariii/Star Tribune via AP Photo)