OPAL Key to common British earthworms

Field key to the common species of UK earthworms devised as part of the engaging Soil and Earthworm survey. Great resource for use as part of the survey and engaging children with earthworm taxonomy and ecology.
 
 ID limitations: covers less than half of UK earthworm species. Records determined using this resource are not accepted by the National Earthworm Recording Scheme. See the ESB 'Limitations of the OPAL Earthworm Guide for Speices Identification' webpage for a full explanation.