White-clawed Crayfish

Our only native freshwater crayfish is under significant decline, primarily due to the introduction of the North American Signal crayfish, (carriers of the ‘crayfish plague’) and agricultural practices amongst others. It is protected under both UK and European legislation.

  • During the survey season (optimal from July to October) the presence of white-clawed crayfish will be determined through setting traps under license and determining whether any adverse effects are likely as a result of the proposed works/development which require mitigation.

Please refer to our Ecology Survey Calendar for further information on White-clawed Crayfish and other protected species surveys.

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