Population Size: < 100 mature individuals
The tiny Seychelles sheath-tailed bat gets its name from the thin membrane that stretches over its hind legs, enabling it to perform amazing acrobatics. But that agility hasn’t saved the bat from invasive species and habitat destruction. It’s already extinct on several islands in the Seychelles—a tiny country in the Indian Ocean—and without immediate action, the bat will disappear altogether.
(MORE: Bat Signal: More than 5 Million Bats Dead From White-Nose Syndrome)