Please note that any four-figure grid references are usually only to the 1-km squares in which the site is found, for database purposes, and are not accurate, while the six-figure references are to individual sites.
Anyone wanting to help with the survey is urged to revisit the old sites in particular to see if glow worms are still present. Bear in mind that some sites may be on private property, and of course some may have changed completely. Unfortunately, many of the old sites are listed by name only, with no detail, so the exact site is now unknown. I have tried to find details of Wootton's original records without success, but it is likely that he reported all the information that was given to him.
Avon & Somerset
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