Common in mature hedgerows, scrub and woodland edges throughout much of England. In Hampshire larvae recorded in numbers from blackthorn in the past, but rather uncommon to light, mostly in the New Forest, and occasionally elsewhere in the county and on the Isle of Wight, where recorded in numbers in some years. Wingspan 17-19 mm. Similar to Green Pug P. rectangulata
, but that species has postmedian line strongly toothed near costa, and Sloe Pug usually has salmon-pink (black in Green Pug) band at base of abdomen. Larva feeds on flowers of Blackthorn, over-wintering as an egg.