Common Blue Butterfly (Polyommatus icarus)

Common Blue Butterfly (Polyommatus icarus)

Observation - Common Blue Butterfly (Polyommatus icarus) - UK and Ireland. Description: Couldn't decide if this was common blue, which I saw a l,ot of or Adonis as it was soooo blue. However the markings looked like common blue on the underside

Couldn't decide if this was common blue, which I saw a l,ot of or Adonis as it was soooo blue. However the markings looked like common blue on the underside