The photo above of a second generation Adonis Blue Polyommatus bellargus taken at Martin Down in Hampshire shows the typical chequered fringe of the male. This is a butterfly which can only be confused with the male Common Blue Polyommatus icarus but in comparison that has a plain fringe as can be seen here. In my opinion the Adonis Blue is bluer, less purpley and the colour is rather more dense. I’ve found that the wings of the common blue are slightly translucent, so depending on the light, the spots and markings on the underwings can often just show through. You may just about be able to make this out depending on the quality of your monitor.
Adonis in Greek mythology, is the male god of beauty. This is certainly a handsome butterfly, arguably the most attractive of the British blues.
What do you think? Feel free to add your comments below.