MNN Galleries

10 animals that are bad for the environment

By: Bryan Nelson on April 14, 2010, 1:05 p.m.
Goats on a hill

Photo: Kevin Collins/Flickr

7 of 12


Goats can have profound negative effects on habitats that are not adapted to them. They can be voracious grazers, often with a taste for native scrub, trees and other vegetation, turning whole woodlands into grasslands if left unchecked. The problem has become particularly bad in places like Australia, as well as on isolated islands around the world where human populations have attempted to establish a settlement. Goats are rugged animals that can easily revert to a feral existence if allowed to do so.