Tree-dwelling species of monkeys and lemurs have been found to be spending increasing amounts of time on the forest floor, scientists say.
The concerning new shift, boffins claim, could be because these animals are seeking refuge from rising temperatures, in a response to deforestation and climate change impacting their habitats.
A study, which was based on more than 150,000 hours of observations of 47 tree-dwelling primate species, was conducted by a team of researchers from Oxford Brookes University.