OSLO (Reuters) – A giant bat with a wingspan up to 5.5 feet has made a comeback from the brink of extinction in Tanzania in a rare conservation success, an environmental group said on Friday. Numbers of the Pemba flying fox, a type of fruit bat, have risen to 22,000 since it was rated critically endangered two decades ago when "only a scant few individual fruit bats could be observed," British-based Fauna and Flora International said. In a release coinciding with Halloween, it said that the bat's maximum wingspan was "greater than the height of the average British woman."