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Noctua interjecta
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Species Account for Polyommatus icarus

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Polyommatus icarus  (Rottemburg, 1775)
Common Blue
Lepidoptera: butterflies: Lycaenidae

Common Blue 2 Copyright: Ben Sale

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Taxonomic group: butterflies (Lepidoptera: butterflies) - County data

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View time series maps for Polyommatus icarus

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Records: 15068
First Record: 1976
Latest Record: 2021

1992-on hectads: 58
Pre-1992 hectads: 46
Total hectads: 58
Additional Phenology Data


Common Blue - 20th August 2013
Common Blue - 20th August 2013
Common Blue (in cop)
Common Blue (in cop)
Common Blue (male)
Common Blue (male)
Common Blue (female)
Common Blue (female)
Common Blue 2
Common Blue 2
Common Blue butterfly
Common Blue butterfly
Polyommatus icarus
Polyommatus icarus

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Common Blue on UK Butterflies website
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Species text
The most widespread of the blues in Britain, the Common Blue is found on unimproved grassland, wasteland and on sea walls. Its larvae feed mainly of Bird's Foot Trefoil (Lotus corniculatus) but other plants are used. There are usually 2 broods each year, the first emerging in May, peaking in early June and the second emerging in July, peaking in early August. When conditions are favourable, the second brood can be extremely abundant, as was the case in 2010. In warm years, a small partial third brood sometimes appears in early October, often at Canvey Island and other Thames coastal sites. The Common Blue overwinters in the larval state. The Common Blue is usually separated from the Holly Blue by its low-level sorties over grassland but it can occassionally rise up high over vegetation making in-flight identification difficult. References

Species text last edited on Sat Feb 18th 2012 by user 745


Broad Habitat Data (based on 284 records with habitat information)

Broad subhabitat Data (based on 5 records with subhabitat information)

Structural Habitat Data (based on 23 records with structural habitat information)

Habitat Detail and Method (based on 15068 records with habitat detail and method information)

Recorded management for locations with Polyommatus icarus

Recorded substrate and hydrology for locations with Polyommatus icarus

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Interpretation of distribution maps