There’s also a giant African snail. It wrecks houses but even more importantly obliterates native snails, which causes a problem for the Everglade snail kite, a bird that eats only native snails.
http://www.invasivespeciesinfo.gov/animals/africansnail.shtml
http://www.invasive.org/browse/subthumb.cfm?sub=7130&start=1