Speckled Wood (Pararge aegeria)

The Speckled Wood is a common species found in woodland and scrub where dappled sunlight and areas of lush grass grow in damper areas. The male will often be seen perched with wings wide open in areas of sunlight chasing intruders and females which wander by. Both male and female butterflies feed on honeydew in tree tops only occasionally being seen feeding on flowers.
It breeds in woodland habitats lanes and tracks between tall hedgerows parks, gardens, and scrub. It seems to prefer slightly damp areas where there is tall grass and some dappled shade. It has spread since the 1920s following a contraction in its range during the late nineteenth and early twentieth centuries. It continued to spread during the 1980's and 90's recolonizing many areas in eastern and northern England and Scotland where it continues to spread northwards as a response to global warming.

Found on the inside of the conservatory window