The invaders: Two Giant African Snails, in the hands of Florida Department of Agriculture and Consumer Services staffers on Thursday (Sept. 15, 2011).
Joe Raedle/Getty Images
September 16, 2011 They are one of the most damaging land snails in the world, and could devastate agricultural areas. So far, about 1,000 have been found in just one square mile. It cost $1 million to remove a previous invasion.
NPR thanks our sponsors
Become an NPR sponsor