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status of microlepidoptera

 

The following criteria for the occurrence of leafminers in Britain are taken from the Review published in January 2012, by Tony Davis:

Davis, A.M. (2012). A Review of the Status of Microlepidoptera in Britain. Butterfly Conservation, Wareham. (Butterfly Conservation Report No. S12-02)

pRDB 1 – Occurs in 5 or less 10km squares

pRDB 2 – Occurs in 6 – 10 10km squares

pRDB 3 – Occurs in 11 – 15 10km squares

pRDB K – Suspected, but not definitely known, to be in one of the above categories but not enough information available to say which.

Nationally Scarce A – Occurs in 16 – 30 10km squares

Nationally Scarce B – Occurs in 31 to 100 10km squares

Local – Occurs in 101 – 300 10km squares

Common – Occurs in more than 300 10km squares

Adventive – Only found in Britain as a result of deliberate or accidental importation by humans

Migrant – Occurs naturally in Britain but only as a result of immigration

 

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