Invasive Nutria Discovered in California
In March 2017, a pregnant, female nutria(Myocastor coypus) was discovered in Merced County. Native to South America, nutria are large, semi-aquatic rodents that are considered one of the world's worst invasive species. Once introduced, nutria rapidly expand in both population size and geographic distribution. Female nutria reach sexual maturity as early as 4 months of age and producing their first litter by 8-9 months of age. They breed year-round, producing up to 3 litters per 13 months, with 2-13 young per litter. Nutria live in social groups consisting of a dominant male, several reproducing females, and juveniles, with maturing males driven out and dispersing up to 50 miles.
Visit CDFW's Nutria Incident web page to learn more about the current status of this infestation, what is being done about it, and how you can help.
2018 California Invasive Action Week: June 2 - 10
The 5th annual California Invasive Species Action Week will be held June 2 through June 10, 2018. Visit the CISAW page or email us at Invasives@wildlife.ca.gov to find out how you can get involved as a partner organization, event host, or as an individual. Check back soon for updates!
New Quagga / Zebra Mussel Regulations
On February 10, 2016, the California Office of Administrative Law issued a Notice of Approval of Regulatory Action for CDFW's proposed dreissenid mussel regulations. These new regulations, Title 14, sections 672, 672.1, and 672.2, developed under the authority of Fish and Game Code sections 702, 2301, and 2302, became effective April 1, 2016. Visit the Quagga / Zebra Mussel Management page for more information.
New Aquatic Invasive Species Identification Poster
The Invasive Species Program has developed a new outreach poster to aid in the identification of six invasive species that threaten California's freshwater environments. View the poster (PDF), or look for it on display in a CDFW office or hatchery. Would you like a copy of the poster to display? Contact us at Invasives@wildlife.ca.gov to request one.