Light Emerald Campaea margaritaria
Wingspan 30-40 mm.
An attractive pale-green species, which has a blood-red tip to the forewing, sometimes extending as a line along the outer edge of both fore and hindwings.
It is quite commonly distributed throughout most of the British Isles, and flies from June to August, often with a partial second generation in the south, appearing in August and September.
The larvae live on the foliage of a number of deciduous trees, and have a distinctive fringe of 'hairs' all along the underside.