Seq # 275020110

Coleophora alnifoliae Barasch, 1934 Species

Last modified: Nov. 18, 2023, 2:50 p.m.

A fairly common species throughout Belgium, more distributed in the northern part.


Family: Coleophoridae > Genus: Coleophora > Species: Coleophora alnifoliae
Vernacular names
Elzenkokermot (NL), Brown alder case-bearer (EN)
First mention in Belgium
Dufrane A. 1960. Microlépidoptères de la faune belge, (neuvième note). — Bulletin du Musée royal d'Histoire naturelle de Belgique 36(29): 1–16. On page 13.




Wingspan: 12–14 mm.
C. alnifoliae is ochreous to light brown with a grey tinge.
The antennae are ringed alternately white and brown to 5/6 of the top while the remaining part is uniformly white.

Museum specimens

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Specimens in nature

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The white caterpillar has a dark-brown head.

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This species builds a slender, brown, spatula case cut out of a leaf.
In May, the fully grown case is about 13 mm long. The mouth angle is circa 15°.
See also


The eggs are deposited on the underside of a leaf of the host plant.
Before wintertime, mostly in September or October, the larva makes two consecutive youth cases . It resumes feeding in May, making the final case, in which it also pupates, in June, preferably on a twig and less often on a leaf.

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Flight periods

The adults fly in June and particularly in July.

Observed on

Host plant (species):
Alnus glutinosa and Alnus incana
Host plant (genera):
Alnus and Betula

The larvae can be found mainly on Alnus glutinosa, Alnus incana, less frequently on Betula.

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This species occurs everywhere in places with Alnus trees.

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