Caught during a steamy moment in a lava tunnel in 2006, these two apparently mating bats – members of a new species – are each no bigger than a human thumb!
Weighing just 0.2 ounce (5 grams), Aellen’s long-fingered bat was discovered on a volcanic island in Africa’s Comoros chain. DNA analysis later confirmed the bat as a unique species.
Subsequent genetic tests also revealed the bat is also found on the west coast of the island of Madagascar.
Source and more info: National Geographic.