Common in oak and other deciduous woodland and areas with scattered oak-trees throughout England. In Hampshire and on the Isle of Wight fairly frequent in old oak woodland, scarce away from that biotope. Wingspan 20-25 mm. Forewing markings similar to those of
C. tumidana, but
C. tumidana differs in having a ridge of reddish, raised scales distal to first line, another cluster of such scales at base of wing, and more indistinct, wavy second line [Goater]. Larva feeds on Oak, living between leaves spun together with silk, often high in the canopy.