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)

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)

A seagull files over a man sitting at a coffee shop backdropped by the Bosporus Strait in Istanbul, Tuesday, November 17, 2020. (Photo by Emrah Gurel/AP Photo)

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)

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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)

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)