bensonbirdman's picture

Common Blue

Observed: 17th May 2011 By: bensonbirdmanbensonbirdman’s reputation in Invertebratesbensonbirdman’s reputation in Invertebratesbensonbirdman’s reputation in Invertebratesbensonbirdman’s reputation in Invertebrates
Common Blue
Description:
Identifications
Species interactions

No interactions present.

Species with which Brown Argus (Aricia agestis) interacts

Comments

Pawpawsaurus's picture

Abdomen length

The cited earlier post in fact used the length of the abdomen primarily to indicate the sex of the individual, rather than the species. Then the combination of its sex (male) and its coloration (brown) determined the species (Brown Argus).

Roger Gilbert's picture

Thank you Pawpawpsaurus ...

for putting me right I had misunderstood. A female Brown Argus would, then, have a short abdomen and not be so straight forward.

Howardian Local Nature Reserve
http://www.howardianlnr.org.uk

Pawpawsaurus's picture

Yes, the females of these

Yes, the females of these species can be trickier to tell apart, though even the brownest Common Blue females usually have at least a few blue scales somewhere.

Failing that, the positioning of spots on the underside is the best way of distinguishing them.