This comprehensive site provides a description of the tunicate, where it is found in the United States, and potential impacts on the environment.

This site examines the behavior of the snakehead and the three biggest reasons to be concerned about this voracious predator. Suggestions are made regarding what can be done to protect your environment from invasive species.

This competent site examines the ecological impacts and health issues related to the introduction of the Brown Tree snake into Guam. Ways to control this snake within Guam are delved into as well.