The secretive indri (Indri indri) of Madagascar, the largest living lemur. It is also critically endangered and highly evolutionarily distinct with no close relatives, which makes its branch one of most precarious on the mammal evolutionary tree. In the likely event that the indri goes extinct, we will lose 19m years of unique evolutionary history from the mammal tree of life. (Photo by Pierre-Yves Babelon/Aarhus University)

A baby pangolin sits with its mother inside a cage prior to their release into the wild in Sibolangit, North Sumatra, Indonesia, Monday, April 27, 2015. The anteaters are part of dozens of live pangolins and around five tons (11,000 lbs) of pangolin meat ready to be shipped abroad confiscated in a police a raid last week. (Photo by Binsar Bakkara/AP Photo)

Four-month-old fox cubs squaring up to each other in Walthamstow, England on August 7, 2015. (Photo by Greg Morgan/Barcroft Media)

A young male fiddler crab is dwarfed by an older male of the same species, looming behind it at Morua estuary, in the Gulf of California, Mexico on January 4, 2022. Whereas female fiddler crabs have small claws of equal sizes, the males’ pincers can vary in size, with the small one used to pick up food and the larger to impress females. (Photo by Claudio Contreras/Solent News)

An American robin feeds on holly berries in a thicket near Elkton in southwestern Oregon on November 16, 2024. Many birds can safely consume holly berries, including blackbirds, redwings, and thrushes. There is an old wives tale that if you see a bird eating a berry, it is safe for humans to eat, but this is not true. Birds consume many plants that are poisonous to humans, holly berries included. (Photo by Robin Loznak/ZUMA Press Wire/Rex Features/Shutterstock)

Hira Punjabi, from Maharashtra, India, took this stunning photo of a parakeet attacking a tree-climbing lizard, which has won the SINWP Bird Photographer of the Year 2024, in aid of RSPB. She had to wait by the same tree for four days to get the perfect action shot. (Photo by Hira Punjabi/SINWP via SWNS)

Long-eared owl chicks sit on a spruce branch in a park near St Petersburg, Russia on March 3, 2025. (Photo by Artem Priakhin/SOPA Images/Rex Features/Shutterstock)

An arctic fox in Iceland spotted on March 19, 2025 by Marc Freebrey, a marketing officer from Gloucestershire. (Photo by Marc Freebrey/South West News Service)