Lepidoptera The Dark Hairstreak Butterfly – Thecla Pruni
The upper side of this butterfly is very much like that of W-album, but it may be distinguished by the presence of a few orange spots near the anal angle of the hind wings. The colouring of the under side (
This insect is not by any means common, but has been seen in considerable numbers in certain localities. It is not found in either Scotland or Ireland, and its chief haunts in England seem to be in Huntingdonshire, Cambridgeshire and Northamptonshire. It frequents wooded country, and flies during June and July.
The eggs are laid late in the summer on the twigs of the blackthorn (Prunus spinosa), and are not hatched till the following spring.
The caterpillar, which is pale green, with rows of yellow spots, may be found in May.