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East Midlands Branch Butterfly Conservation

Common Blue Polyommatus icarus


The Common Blue is the most widely distributed of the British blues and is commonly seen in a wide range of grassy habitats, including meadows, dunes, heaths, roadside verges and gardens.


The male is violet-blue with a fine black edge and white wing margins. Females also have white wing borders, and vary from the usual brown form with a hint of blue to those which are extensively blue varieties, all with orange marginal spots. The underside of the hind wings lacks the vertical twin spots of the Brown Argus.

Flight times

Generally double-brooded, it is on the wing in May and June, and again in August and September.

Food plants

Eggs are laid singly on a variety of leguminous plants, but it favours Bird's-foot-trefoil, Restharrow and Black Medick.

Common Blue - © Simon Jenkins cut out picture of common blue butterfly

Distribution Maps for the East Midlands Region

Common Blue distribution map 2010
2010 Summary
No of tetrads 285
First sighting 01/05/2010
Last sighting 11/10/2010
Common Blue distribution map 2011
2011 Summary
No of tetrads 270
First sighting 19/04/2011
Last sighting 15/10/2011
Common Blue distribution map 2012
2012 Summary
No of tetrads 173
First sighting 10/04/2012
Last sighting 07/10/2012
Common Blue distribution map 2013
2013 Summary
No of tetrads 311
First sighting 06/05/2013
Last sighting 28/09/2013
Common Blue distribution map 2014
2014 Summary
No of tetrads 399
First sighting 26/04/2014
Last sighting 28/10/2014
Common Blue distribution map 2015
2015 Summary
No of tetrads 492
First sighting 28/03/2015
Last sighting 11/10/2015
Common Blue distribution map 2005-09

Combined records for the five year period 2005-09

Common Blue distribution map 2010-14

Combined records for the five year period 2010-14

Comparison of years 2005-09 & 2010-14

No Data.


Photo Gallery

Common Blue

Common Blue © Simon Jenkins

Common Blue

Common Blue - male © Simon Jenkins

Common Blue

Common Blue - female © Simon Jenkins

Common Blue

Common Blue © Simon Jenkins

Common Blue Common Blue Common Blue Common Blue
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