Last modified: June 1, 2024, 2:47 p.m.
A fairly common species throughout Belgium, sometimes a pest in parks and gardens.
This species is considered Least Concern according to the IUCN Red List category for Flanders 2023.
Native
In autumn, the small caterpillars form colonies of larvae in trees and bushes constructed from a single leaf wrapped tightly with large amounts of white silk, which make a tough communal web. In spring, they emerge from the cocoon and grow into large caterpillars. By the end of June, the full-grown larvae start to pupate and the imago emerges towards the end of July. The adults come to light.
The adults fly in one generation a year; from late May towards late August.
The larvae live gregariously in webs spun in bushes of Crataegus or Prunus spinosa, at the coast mainly on Hippophae rhamnoides.