Seq # 602010250

Idaea sylvestraria (Hübner, 1799) Species

Last modified: May 16, 2024, 1:17 p.m.

A rare species in Belgium, mainly known from the Kempen and the south of the country.

This species is considered Endangered according to the IUCN Red List category for Flanders 2023.


Family: Geometridae > Subfamily: Sterrhinae > Tribus: Sterrhini > Genus: Idaea > Species: Idaea sylvestraria
Vernacular names
Randstipspanner (NL), Dotted Bordered Wave (EN), L'Acidalie sylvestre (FR), Weißlichgrauer Zwergspanner (DE)
First mention in Belgium
De Sélys-Longchamps E. 1844. Énumération des insectes Lépidoptères de la Belgique. — Mémoires de la Société royale des Sciences de Liége 2: 1–35. On page 18.




Wingspan 16–23 mm.

Museum specimens

Specimens in nature


It hibernates as larva and pupates in the ground.
The adults come to light.

No pictures yet!

Flight periods

The adults fly from end of May till end of August in one generation.

Observed on

Host plant (genera):
Taraxacum and Polygonum
Herbaceous plants

The larva lives on different species of low herbaceous plants like Artemisia vulgaris, Polygonum, Taraxacum or Thymus.

No pictures yet!