It is presumed that the enlarged hindwings help to fan the scent from the scales over the female during courtship.
Bright green speckled with black, white, yellow until last moult, then turns duller, marbled with dark green. Feeds on host foliage.
Pupates in cocoon in soil.
Males with long tuft of yellowish scent scales under each forewing and enlarged hindwings (vanilla-like scent). Found all year. Rest on mossy tree trunks by day. Fly at night to visit flowers, attracted to light.
16 - 19mm