Where has the three-spined stickleback been recorded?

Gasterosteus aculeatus occurrence evidence comes from 87,521 records in 37 countries and territories, from 1860 to 2026. Most records come from Belgium.

• 87,521 records
• 37 places
• 137 years recorded
• — class

Observation evidence passport

Compare this animal’s observation pattern

When it is recorded

Peak month: April. 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 three-spined stickleback has been recorded

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