As commonly known, it does NOT feed on Betula at all, but rather on Prunus.
Finland, U: Sipoo, ex ovo 1992, Leg: T. Sulin,
Finland, EH: Hämeenkoski (Koski Hl), ex ovo 1999, Leg: K. Silvonen,
Finland, PK:Tohmajärvi, Jalajanvaara, ex larva 12. June 2001, Leg: M. Koponen,
Photo © Kimmo Silvonen