Bat-Eating Spiders Are Everywhere, Study Finds

Charles Choi, LiveScience Contributor

Date: 15 March 2013 Time: 03:19 PM ET

There's only one place in the world to escape bat-catching spiders: Antarctica. These arachnids ensnare and pounce on bats everywhere else in the world, researchers say.

Bats rank among the most successful groups of mammals, with the more than 1,200 species of bats comprising about one-fifth of all mammal species. Other than owls, hawks and snakes, bats have few natural enemies.

Still, invertebrates — creatures without backbones — have been known to dine on bats. For instance, giant centipedes in a cave in Venezuela were seen killing and eating bats, and the arachnids known as whip spiders were spotted feeding on dead bats in caves of the Caribbean. Cockroaches have been observed feeding on bat pups that have fallen to the floor of caves.

Bat-eating spiders are common and apparently creep around every continent, except Antarctica, devouring various bat species. Here, a dead bat (Rhinolophus cornutus orii) caught in the web of a female Nephila pilipes on Amami-Oshima Island, Japan.

Continued:  http://www.livescience.com/27947-bat-eating-spiders-worldwide.html