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June 3-11, 2023

Invasive species are non-native organisms (plants, animals, or microbes) that establish, quickly reproduce, and can negatively affect our water, health, native plants and animals, agriculture, and economy. 

The San Francisco Bay-Delta ecosystem is recognized as one of the world's most-invaded estuaries. Prevention is the most effective strategy in managing invasive species. However, hundreds of invasive plants and animals have already been established in California and are spreading each year.

Join others across the state to help stop the spread of invasive species! From June 3 through June 11, state and local agencies will be hosting discussions, activities, and volunteer opportunities as part of California Invasive Species Action Week. 

California Natural Resources Agency Secretary Wade Crowfoot

Secretary Speaker Series

Join California Natural Resources Agency Secretary Wade Crowfoot and others for a webinar to kick off California Invasive Species Action Week.

Defending the Golden State: Safeguarding Californians from Invasive Species

When: Friday, June 2 from 12-1 p.m.

Delta Interagency Invasive Species Coordination (DIISC) Team

The DIISC Team was formed to foster communication and collaboration among California state agencies that detect, prevent, and manage invasive species and restore invaded habitats in the Delta. 

The DIISC Team organizes a biennial Delta Invasive Species Symposium, and the next event is set to take place in late 2023. Stay tuned for updates on this year's event! 

Water hyacinth, an invasive species in the Delta

How You Can Help: Informational Resources

The below links have helpful information on invasive species in California and beyond: 

• Compilation of California's Invaders by the California Department of Fish and Wildlife: Information on different invasive species, including their distribution, habitat preference, pathways of spread, impacts, and what to do if you find one.
• California Invasive Plant Council: Invasive plant ID guides can be found on the Cal-IPC Inventory page. 
• UC Riverside Center for Invasive Species Research: Collection of species profiles and videos.
• Don't Let it Loose: Helpful tips for pet owners. 
• Don't Move Firewood: Graphics and tips for campers.
• Habitattitude: Helpful tips for pet owners and water gardeners.
• Play Clean Go: Graphics and tips for outdoor recreation enthusiasts.
• Stop Aquatic Hitchhikers: Graphics and tips for water recreation users. 

Reporting Nutria Sightings

Nutria are one of the most well-known invasive species in the Delta. If you see nutria or potential signs of them, send photos to CDFW's Invasive Species Program online, by email to invasives@wildlife.ca.gov, or by phone at (866) 440-9530. 

Not sure about what you saw? The Delta Stewardship Council created a convenient nutria pocket guide to aid in field identification of nutria. 

Nutria were originally introduced to the U.S. for the fur trade. They are primarily found near permanent water sources.

Sacramento-San Joaquin Delta Conservancy

(916) 375-2084 | deltaconservancy.ca.gov

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