As the world teeters on ecological collapse, it’s occasionally nice to hear that an animal that was once thought to have gone extinct was just really good at hiding. Take the Bangka slow loris, an extremely slow primate that lives in trees and is also venomous.

For years, it had been considered critically endangered, maybe even fully extinct, as the last time any scientific team saw one was back in the 1930s. But it’s back, and according to new research published in Spixiana , there are at least 90 of them hanging out on the island of Bangka, off the southern coast of Sumatra.

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Scientists thought this nocturnal tree-dweller was gone, but local residents and Indonesia’s Alobi Wildlife Rescue Center knew better. They’d been looking into the loris’ gigantic glassy eyes for about a decade, as Alobi workers had been spotting the loris since about 2015.…