European Common Blue (Polyommattus icarus)

A small butterfly species with intense blue color on the back of the wings and beautiful pattern on the lower side of the wings, It is an European species introduced in the Mirabel Airport region and now frequently observed in Montreal and surrounding area.

How To Identify

There are similar species with the intense blue color of the wing, endemic to the region. I identify this species based on the pattern of black and orange spots on the underside of the wings.

Where and When to Spot

I have been able to spot this species in different parks in Montreal. Usually late summer, early autumn.


Photos of this species with information about where, when the photo has been taken; camera, lens used and camera settings.

  • Rapids Park Lachine

    Saturday, September 22, 2018

    NIKON D500
    90mm f/2.8

    Focal Length 90mm
    Shutter Speed 1/200s
    Aperture f8.0
    ISO 180

  • Champ des Possibles

    Saturday, September 26, 2015

    NIKON D7100
    18.0-140.0 mm f/3.5-5.6

    Focal Length 140mm
    Shutter Speed 1/800s
    Aperture f5.6
    ISO 200


Polyommattus icarus