Willow Knot-horn
Common NameWillow Knot-horn
Scientific NameApomyelois bistriatella
FamilyPyralidae
SubfamilyPhycitinae
Wingspan (mm)20
Primary Colorsorange, black, grey
HabitatWoodlands, fens, marshes, gardens, and areas with willow or poplar trees
Geographic RangeEurope and parts of Asia
Host PlantsSalix spp. (willow), Populus spp. (poplar), Betula spp. (birch)
Flight PeriodMay to August (sometimes a partial second generation in September)
Conservation Statusleast-concern
Lifecycle NotesLarvae feed internally within spun leaves or under bark of host trees, overwintering as larvae before pupating in spring.
Identification TipsLook for the combination of the reddish-orange basal patch, the dark median band with a pale inner edge, and the overall small size and mottled appearance of the outer forewing.
Description
A small moth characterized by a distinct reddish-orange basal area on the forewings, followed by a prominent dark band edged with a pale line, and mottled grey-brown outer wings.
