California Investigates Deliberate Introduction of Invasive Nutria Population

Sat, 11 Apr 2026 07:31:00 +0200

California wildlife officials are investigating the possibility that an invasive rodent species, the nutria, was intentionally introduced to the state. These large rodents, resembling a mix of beaver, platypus, and rat, have caused significant damage to California's waterways and agricultural lands after nearly being eradicated decades ago. Recent genetic analysis indicates a close match between the current California nutria population and those found in Oregon, making natural migration highly improbable. Researchers speculate that the rodents may have been deliberately transported as a natural vegetation control method or simply for personal preference. Originally brought to the U.S. in the early 20th century for fur farming, nutria are known for their destructive impact on wetland ecosystems. The California Department of Fish and Wildlife is now working to understand the circumstances surrounding the re-emergence of this invasive species and to develop strategies for managing the pop