A Comma butterfly (Polygonia c-album) rests with its wings open on the leaf of a low growing plant.
From Wikipedia (https://en.wikipedia.org/wiki/Polygonia_c-album):
Polygonia c-album has a wingspan of about 45 millimetres (1.8 in). The underside of the wings of this butterfly are a dull brown colour, with a small white 'C' shaped marking resembling a comma (hence the common name). The wings have a distinctive ragged edge, apparently a cryptic form as the butterfly resembles a fallen leaf.
These butterflies hibernate, so they could be seen all around the year, but the active flying period extends from April to November, depending on location.