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Invasive Species Program
New Zealand Mudsnail
New Zealand mudsnails around a dime
New Zealand Mudsnail INFO
- Map of CA Infested Areas:
Go to “Custom Maps” near the bottom of the page. Click on California in the left-hand column to see a dot map of occurrences. Click on each dot to get information about individual sites. Click on California in the right-hand column to see the hydrologic unit that each occurrence is located in. These maps may take a minute or two to load. Any new information entered into the database is incorporated into the maps when you select them. - New Zealand Mudsnails in the Western U.S.: www.esg.montana.edu/aim/mollusca/nzms
- Frequently Asked Questions
- General Invasive Species Info
What you can do to prevent the spread of New Zealand Mudsnails
- If you wade, freeze waders and other gear overnight (at least 6 hours).
- Have extra waders and boots that are used only in infested waters. Store them separately.
- After leaving the water, inspect waders, boots, float tubes, boats/trailers—any gear used in the water.
- Remove visible snails with a stiff brush and follow with rinsing.
If possible, freeze or completely dry out any wet gear. - Never transport live fish or other aquatic animals or plants from one water to another.
- Snails range in size from a grain of sand to 1/8 inch in length and are black or brown in color.
- GET THE WORD OUT !
News Releases
- DFG Seeks Assistance in Slowing Spread of New Zealand Mud Snails (January 7, 2008)
- New Zealand Mud Snails Found At Hot Creek Hatchery (February 14, 2007)
- Putah Creek to Re-open to Fishing April 24 (April 16, 2004)
- DFG Offers Suggestions to Prevent Spread of New Zealand Mud Snails (January 13, 2004)
- Discovery of Invasive New Zealand Mud Snail Forces Temporary Closure of Putah Creek (December 16, 2003)
Documents
- National Management and Control Plan for the New Zealand Mudsnail (PDF)
- How to Prevent the Spread of New Zealand Mudsnails through Field Gear (PDF)
- New Zealand Mudsnail Watch Card (PDF)
- Controling the Spread of NZMS on Waders (Admin Report 2005-2) (PDF)
- Printable Mudsnail 12" x 18" color poster (PDF)
- Printable Mudsnail 11" x 17" black and white poster (PDF)