On my window cill this morning

On my window cill this morning

Observation - On my window cill this morning - UK and Ireland. Description: About 10-15mm long, this insect was walking about rather then flying and the wings didn't always flap in unison. Although it was indoors our office is next to mainly broadleaved woodland and we have a large garden with grass and wildflower/meadow section

About 10-15mm long, this insect was walking about rather then flying and the wings didn't always flap in unison.
Although it was indoors our office is next to mainly broadleaved woodland and we have a large garden with grass and wildflower/meadow sections as well as a pond