Food Plant: Alnus glutinosa (alder)

Mine: probably from September (early feeding not recorded) to November, feeding again from late May to June or July. There is also a biennial population, which aestivates and completes feeding in June or July of the second year.

Notes: The final case is 11-13mm long, slender, and fixed at 45° to the leaf surface, with anal end laterally compressed and bivalved.
The final case (12mm long) is shown here.

Data: 14.v.2003, South Hampshire, VC11

Image:© Ian Thirlwell