Polygonia c-album

The Comma butterfly is a common British butterfly and one of the most easily identified species when seen settled.
It has a wingspan of up to 50mm with jagged edges to both fore and hindwings. When settled, with wings closed, the dark broken outline of the butterfly blends in cryptically with its surroundings making it very difficult to see.
Located in the centre of the underside of the hindwing is a tiny white mark which resembles a comma punctuation mark, from which the butterfly derives its name.