The DNA of rare small-clawed otters in captivity in Japan has been matched to wild populations in poaching hotspots in Thailand

Posing for selfies on the laps of excited visitors, the otters of Tokyo’s animal cafes have learned to play their part in their online stardom. In thousands of social media videos, the aquatic mammals wriggle through the outstretched hands of adoring customers who reward their attention with food.

But the booming demand has raised major concerns among conservationists, with a study published in the journal Conservation Science and Practice linking the small-clawed otters in animal cafes in Japanese cities with wild populations in poaching hotspots in Thailand.