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Archiearis parthenias

Orange underwing

Description

Archiearis parthenias, commonly known as the orange underwing, is a moth belonging to the family Geometridae. This species is widely distributed across Europe, including parts of Asia and North Africa. As the name suggests, the Orange Underwing has vibrant orange-colored hindwings, which are revealed when the moth is in flight. However, when at rest, its forewings typically cover the bright hindwings, making it less conspicuous. The forewings are usually brown with intricate patterns, providing effective camouflage when resting on tree trunks or foliage. Like other moths in the family Geometridae, the Orange Underwing has a distinctive way of moving by looping or inching forward, using its prolegs. The larvae of Archiearis parthenias feed on various deciduous trees, prefering birch. Adults are on the wings very early in Spring.

Symptom

Green catterpilar on leaves or twigs. Defoliation of the crown.

Tree Species: Birch

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes