The survival of an entire species of "incredibly endangered" tree snails has just been entrusted to the British Zoo. The population of tiny tree snails--they grow to be only a few millimeters long--has been decimated, eaten into extinction by a larger "cannibal snail." Called the Rosy Wolfsnail, it arrived as an invasive species to the tree snail's natural habitat of French Polynesia in the 1970s. The larger cannibal snails, along with habitat loss, have pushed the tree snail to extinction in the wild--there are now only 88 left in the world, in a lab in England. But the British Zoo intends to save them . ....Read the full story on TreeHugger