Introduced Species
Invasives in the Chesapeake
Invasive and Exotic Species
U.S. Department of Agriculture
National Invasive Species Information Center
Invasive Species Specialist Group
Australian Invasive Species
BBC's State of the Planet: Introduced Species
Friedman's Materials Page
(for Zebra Mussel Slide Show)
The Nature Conservancy's Invasive Species Initiative
Chesapeake Bay Nonindigenous Species List
Back to Mr. Friedman's Page