Definition of ‘rare’, ‘scarce’ or Red Data Book National Status

You will see some of these codes in the information I collect about the insects below is the categorisation and explanation

RDB 1 – species appear in the Red Data Book and are categorised as endangered;
RDB 2 – species appear in the Red Data Book and are categorised as vulnerable;
RDB 3 – species appear in the Red Data Book and are categorised as rare;
RDB K – species appear in the Red Data Book but the status is unknown, although they are thought to be rare;
pRDB 1 – species are likely to appear in the Red Data Book and be categorised as endangered;
pRDB 2 – species are likely to appear in the Red Data Book and be categorised as vulnerable;
pRDB 3 – species are likely to appear in the Red Data Book and be categorised as rare;
N – species are nationally notable and have been recorded in 16-100 ten kilometre squares in Great Britain.
Na – species are nationally notable and have been recorded in 16 – 30 ten kilometre squares in Great Britain;
Nb – species are nationally scarce and have been recorded in 31 – 100 ten kilometre squares in Great Britain

Advertisements