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)

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)

These friends took a tumble after sharing a hug in Leeds in northern England on May 17, 2021, as Covid-19 lockdown restrictions ease. (Photo by London News Pictures)

Muslims greet each other at Sultanahmet Square after performing Eid al-Adha prayer at Hagia Sophia Grand Mosque in Istanbul, Turkey on July 20, 2021. (Photo by Mehmet Murat Onel/Anadolu Agency via Getty Images)

A woman learns how to use an AK-47 assault rifle during a civilians self-defence course in the outskirts of Lviv, western Ukraine, on March 4, 2022. The Russian army occupied on March 4, 2022 the Ukrainian nuclear power plant of Zaporozhie (south), the largest in Europe, where bombings in the night have raised fears of a disaster as more than 1.2 million people have fled Ukraine into neighbouring countries since Russia launched its full-scale invasion on February 24, United Nations figures showed on March 4, 2022. (Photo by Daniel Leal/AFP Photo)

Revelers during the Leeds Festival 2022 at Bramham Park in Leeds, United Kingdom on August 26, 2022. (Photo by Danny Lawson/PA Wire Press Association)

A woman cuts her hair during a protest against the death of Iranian Mahsa Amini and the government of Iran on October 02, 2022 in Istanbul, Turkey. (Photo by Chris McGrath/Getty Images)

A view of snow blanketed ancient giant statues and remains, dating back to 2.000-year-old Commagene Kingdom, located in the 2.150-meter-altitude Mount Nemrut, which is listed in the UNESCO's World Heritage List, in Kahta district of Adiyaman, Turkiye on February 02, 2024. (Photo by Ozkan Bilgin/Anadolu via Getty Images)