What's the difference between
a male and a female common blue butterfly?

What's the difference between
male and female
common blue butterfly?


Polyommatus icarus

  • The common blue is as common as its name suggests, being seen all over the UK.

  • The female's underwings are brown whereas the male's  are much more blue - being bluer nearer to the body.

  • The male's upper wings are powder blue. The female's upper wings have orange markings at their edge and are generally more brown than male upper wings. 

  • To complicate matters, the colour of the female's upper wings can be very variable and may, in some localities, be as blue as the male's.