Seq # 185120100

Caloptilia populetorum (Zeller, 1839) Species

Last modified: April 10, 2021, 10:47 a.m.

First observed in Belgium in 1995 in AN, a second observation in 2004 also in AN, since then recorded more frequently but this species remains rare in Belgium.


Family: Gracillariidae > Subfamily: Gracillariinae > Tribus: Gracillariini > Genus: Caloptilia > Species: Caloptilia populetorum
Vernacular names
Witteberkensteltmot (NL), Clouded slender (EN)
First mention in Belgium
Steeman C. & De Prins J. 2005. Caloptilia populetorum, nieuw voor de Belgische fauna (Lepidoptera, Gracillariidae). — Phegea 33(1): 33–35. On page 33. view page




Ground colour greyich ochreous, a triangular blotch at the middle of the costa of the same colour as the ground colour, bordered with some scattered dark brown scales.

Museum specimens

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Specimens in nature


Whitish with light brown head, pronotum without black spots.

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First instars live in a gallery on either side of a leaf.
See also and

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Pale green, transparant membrane, generally on the underside of leaf.

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Free living instars live in a leaf rolled longitudinally, upperside inwards.
The species hibernates in the adult stage. They rest on tree trunks during the day and come to light.

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Flight periods

The adults fly from early July till early September and after hibernation till early May.

Observed on

Host plant (species):
Betula pendula
Host plant (genera):

The larvae feed on Betula, preferably on young trees.

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