Mammals - invasive

Nutria (Myocastor coypus) on Jul 30, 2008

Submitter has sample

Description of specimen

Many, many nutria.


Are Bull Frogs also invasive? There is a large-sounding croaking frog at night. I have been told it's a Bull Frog and that they are invasive as well.

July 30, 2008, 1:03 p.m.

Thank you for submitting this report. Nutria are now common in wetlands throughout the Eugene area. Nutria are also prolific breeders, so you may see this particular nutria population continue to grow in the future.

Yes, the bull frog is an invasive species as well. This species is also common throughout the region.

If you would like more information on nutria and what is being done in the Pacific Northwest, please visit the nutria page on the Center for Lakes and Reservoirs website at My contact information can also be found on this page if you have further questions.

Trevor Sheffels
Center for Lakes and Reservoirs
Portland State University

Trevor Sheffels
Aug. 1, 2008, 10:32 a.m.