Brown Hairstreak

Thecla betulae

Scarce & localized in parts of England in scattered populations.

Larva Adult in June, clothed with short thin hairs, green with a yellow line on back and sides, yellow subdorsal oblique spots and a brown retractile head; on certain Prunus and Amygdalus, more rarely on birch, hazel and cherry.

The Larvae feeds on Buckthorn & Blackthorn.

Black-brown; Male with a pale diffuse patch, Female with a broad orange band beyond the crossveins.

Underside ochreous, with dark-edged white lines.

Flight period is during August & September.