American bullfrogs have the potential to wreak havoc in B.C. watersheds - Langley Advance Times

Invasive species cost world US$16B: study

Invasive American bullfrogs are spreading in BC: And they're very

Science World's American Bullfrog Invasion - Science World

Bullfrog Action Group

American bullfrog - Invasive Species Council of British Columbia

What's in Your Watershed: The Bellowing American Bullfrog - The

The History of American Bullfrog Control in the Central Kootenays

PukeOnABook

Bullfrog Invasion - A crisis in the making.