Where has the New Zealand Mudsnail been recorded?

Potamopyrgus antipodarum occurrence evidence comes from 6,729 records in 26 countries and territories, from 1883 to 2026. Most records come from United States.

• 6,729 records
• 26 places
• 86 years recorded
• Gastropoda class

Observation evidence passport

Compare this animal’s observation pattern

When it is recorded

Peak month: August. Records cluster in the months an animal is present and being looked for, so a summer peak can reflect observer effort as much as the animal.

Records over time

Recording effort has risen steeply almost everywhere since the 1990s, so a rising line usually shows more observers rather than more animals.

Where New Zealand Mudsnail has been recorded

The countries below show where occurrence evidence exists for New Zealand Mudsnail. They do not define a complete habitat range: survey effort differs by place, and historical or one-off records can appear alongside repeated presence.