This is the last of the seven new butterflies I saw during my seven days in Sussex and the second from my walk around Seaford Head (see yesterday’s blog for the first). This stunner used to be known as the Chalkhill blue and is now the Chalk hill blue – I haven’t been able to find out why the change was made but the name does indicate their preferred location, the grasslands found on the chalk hills and downs of southern England. (Its scientific name, Polyommatus coridon, hasn’t changed.)

Luckily, the two butterflies I saw were both males – I say luckily because the female looks an awful lot like a Brown argus / Common blue female, and we all know how tricky those are to distinguish.

Apparently, these stunning males are often seen in large numbers, many hundreds together, flying low over vegetation in search of females. What a glorious sight that would be!