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EASY GUIDE TO BRITISH CLICK BEETLES - ELATERIDAE
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       Agriotes obscurus   | 
    
 Agriotes pallidulus   | 
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        Aplotarsus incanus  | 
      
 Elateridae  | 
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There are aproximnately 73 Species of Elateridae found in Britain
RDB1: Endangered. Species which have shown a rapid continuous decline over the last twenty years, and now exist in 5 or fewer 10km squares of the national grid.
RDB2: Vulnerable. Species likely to move into RDB1 in the near future, as most or all populations are declining. Found in 15 or fewer 10km squares since 1980.RDB3: Rare. Species with small populations which are localised or thinly scattered, but not at present qualifying for RDB1-2. Found in 15 or fewer 10km squares since 1980.
RDBK: Species believed to be rare but too recently discovered to be categorised easily.RDBI: Red data book indeterminate. Species believed to be rare, but for which data on their distribution is insufficient to allow a grade to be assigned.
Na: Nationally Scarce Grade A. Recorded in 16-30 10km squares since 1980.
Nb Nationally Scarce Grade B. Recorded in 31-100 10km squares since 1980.