Bucculatrix demaryella (Duponchel, 1840)

birch bent-wing

Bucculatrix demaryella mine

Betula pubescens, Duin en Kruidberg


The mine begins at an oval, lower-surface egg. Here begikns a short, full depth corridor, often along the midrib or a thick vein. Most of the mine with a thick frass line. The larva soon leaves the mine, and starts causing window-feeding, later earing holes in the leaf. The larval chamber (the space occuped by the larve, while in the mine, obviously free of frass) is more than three times as long as wide. Pupation in a slender, greyish brown cocoon with c. 10 sharp length ridges.


Betulaceae, oligophagous

Betula nana, pendula, pubescens; Corylus avellana.

In the Benelux mainly (exclusively?) on Birch. Patočka (1996a) and Biesenbaum (2010a) additionally mention Acer, Aesculus hippocastanum, and Castanea sativa, but this maty refer to cases of xenophagy.


Bivoltine; hibernation as pupa.


BE recorded (Phegea, 2009).

NE recorded (Kuchlein & de Vos, 1999a; Microlepidoptera.nl, 2009).

LUX recorded (Ellis: Dedelange).

distribution within Europe

Europe, except the Iberian Peninsula, parts pf the Balkan Peninsula, and the Mediterranean Islands (Fauna Europaea, 2009).


The mining larva is pale yellow with a darker head (the free living larva is grey green).


Described byPatočka (1996a), Patočka & Turčáni (2005a).

Young mines of the common Rhamphus pulicarius may deceivingly resemble demaryella mines, especially when they are situated in a vein axil, as often is the case. Rhamphus mines never have an exit hole, because the larva remains in the mine. Below a few pictures of the look-alike:

Rhamphus pulicarius mineRhamphus pulicarius mine

Rhamphus pulicarius on Betula pendula, Rheden: mine lighted from above and from behind

Rhamphus pulicarius mine

Same minem detail: a Rhamphus mine invariably contains a larva.


Ahr (1966a), Bengtsson & Johansson (2011a), Biesenbaum (2010a), Buhr (1964a), Burmann (1991a), Buszko (1987a, 1992b), Emmet (1985a), Gielis, Huisman, Kuchlein, van Nieukerken, van der Wolf & Wolschrijn (1985a), Hering (1934b, 1957a), Huemer (1986b, 2012a), Huisman & Koster (1999a), Klimesch (1937b, 1950c, 1956a), Klimesch & Skala (1936b), Kozlov, van Nieukerken, Zverev & Zvereva (2013a), Kuchlein & Donner (1993a), Kuchlein & de Vos (1999a), Kurz & Embacher (2012a), Maček (1999a), Nowakowski (1954a), Patočka (1996a), Patočka & Turčáni (2005a), Pinzari, Pinzari & Zilli (2013a), Robbins (1991a), Skala & Zavřel (1945a), Sønderup (1949a), Svensson (1971a), Szőcs (1977a), Tomov & Krusteva (2007a), Viramo (1962a), Zoerner (1969a, 1970a).


mod 9.ii.2018