Alien crayfish and crayfish plague

Leaflet advising how to stop the spread of alien crayfish (North American signal crayfish) and crayfish plague.

This publication was withdrawn on

This guidance has been superseded by advice that is now available from the GB non-native species secretariat website.


Stop the spread of alien crayfish and crayfish plague

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This leaflet expalins how to stop the spread of ‘alien’ (North American signal) crayfish and the plague it carries, which affects native crayfish.

The leaflet covers:

  • What are alien crayfish?
  • How do they get here?
  • Why are they a problem?
  • How you can help
Published 1 January 2006