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Wednesday, 29 July 2026

29-7-2026 COBH, IRELAND - RUSH VENEER MOTH (Nomophila noctuella)

Nomophila noctuella, the rush veneer, is a species of moth of the family Crambida

This species has a nearly cosmopolitan distribution (Europe, North Africa, Central Asia, Pakistan, North America. In Europe, it is a migratory species, travelling from southern Europe and North Africa to Northern Europe.

The wingspan is 26–32 mm. Forewings are very elongated and narrow. The basic color of the forewings is usually brown, with darker wide eight-shaped and reniform markings in the discal and postdiscal areas] Some dark brown spots are present close to the outer edge and to the apex. The hindwings are whitish with brown veins.

The mature larvae are gray green and spotted. They can reach a length of 15–20 millimetres (0.59–0.79 in.

These moths fly from May to September depending on the location. They are attracted to light, and in Europe they are migratory. There are two to four generations per year.

The larvae feed on Trifolium, clover, Medicago, Polygonum aviculare, wheat, Vaccinium and various other grasses. They pupate in a cocoon amongst the leaves of the host plants or on a stone. The pupa hibernates.


Nomophila noctuella, commonly known as the rush veneer, is a small migratory moth belonging to the family Crambidae. It is widely recognized for its narrow, elongated shape at rest and its strong migratory behavior across Europe and other regions. 

Physical Appearance.

Wingspan: 26–32 mm.

Forewings: Very narrow and elongated, typically brownish with darker eight-shaped or reniform markings.

Hindwings: Whitish with pale brownish veins.

Resting posture: Holds its wings tightly wrapped around its body, creating a distinct, stick-like silhouette. 

Behavior and Migration

Migrant status: A strong flyer and notable migrant often seen arriving in large numbers along coastal watchpoints during the warmer months. 

Flight season: Adults generally fly from May through September or October depending on the latitude. 

Life Cycle and Diet

Host plants: Larvae feed on low-growing plants, primarily clover (Trifolium species), alfalfa (Medicago), knotgrass, and various grasses.

Caterpillars: Gray-green with dark spots, reaching lengths of about 15–20 mm.

Pupation: Occurs inside a silken tube or cocoon near the ground or amongst host plant leaves.