Seq # 602010050

Idaea dilutaria (Hübner, 1799) Species

Last modified: March 25, 2021, 9:01 p.m.

A rare species in Belgium, confined to the southern provinces. Nowadays, all observations come from the limestone area, where in some places it can be numerous.


Family: Geometridae > Subfamily: Sterrhinae > Tribus: Sterrhini > Genus: Idaea > Species: Idaea dilutaria
Vernacular names
Parelstipspanner (NL), Silky Wave (EN), L'Acidalie diluée (FR), Einfarbiger Zwergspanner (DE)
First mention in Belgium
Lambillion L.-J. 1900–1913. Catalogue des Lépidoptères de Belgique. — Revue mensuelle de la Société entomologique namuroise Supplément: 1–464. On page 244.




Museum specimens

Specimens in nature

Flight periods

The adults fly in one generation a year: from late June to end of July. Easily disturbed by day. They are active from dusk onwards and later come to light.

Observed on

Host plant (species):
Helianthemum nummularium

The larva lives on various herbaceous plants like Helianthemum mummularium and also on lichens. Hibernates as larva and pupates in a cocoon on the ground.

No pictures yet!