Yponomeutidae

16.005 Willow Ermine Yponomeuta rorrella (Hübner, 1796)

Local / Immigrant

Similar species:

Forewing: 9 to 11.5mm

Habitats: Deciduous woodland, marshes, fen or wherever its foodplants are found.

Habits: This is an immigrant as well as a resident species.

Foodplant: The larva feeds gregariously in a web on the leaves of White Willow or occasionally Grey Willow, but usually in small numbers. It pupates in a cocoon either on the trunk or in the web.