Adults, which grow to 5 inches in length, stick close to home. They migrate only between breeding ponds and those in which they reside during the rest of the year. The eft, however, will cover up to 10 square miles in its search for food. Thanks to that noxious skin, predation isn't a significant hazard to these creatures, common from maritime Canada to the Great Lakes and as far south as Texas and Florida. Humans are another story: The effects of deforestation, habitat fragmentation, and pollution are significant threats to newt populations.