Common resident.

Alnus glutinosa with larva feeding in May and July, initially in a blotch in the upper side of a leaf and later in a downward rolled leaf margin. Pupation takes place in a transparent, shiny cocoon, generally at the leaf margin.

	Determination by Genitalia Examination (gen. det.) Required

Recorded in 80 (57%) of 140 10k Squares. First Recorded in 1865. Last Recorded in 2022. (Data up to end 2022) Additional Stats

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