It has become a spring tradition to try to get a shot of the Western Spring Azure in flight. The blue colour is only apparent when the butterfly’s wings are open, and generally that is when it is flying. But, the butterfly is small (about 29 mm wingspan) and it is a fast flier, making such a shot difficult. Most years I fail.
When resting, the spring azure folds its wings to show a mottled grey camouflage on the underside.
Only rarely when it is resting will it open its wings to reveal the colour.
Typically, one only sees the colour as a tiny patch of blue shoots past.