Bug Identifier
Large Yellow Underwing
Community identification

Large Yellow Underwing

Noctua pronuba

Order & Family
Lepidoptera, Noctuidae
Size
Wingspan of 50–60 mm (approx. 2 inches).
See this bug in the Encyclopedia

Natural Habitat

Diverse habitats including gardens, woodlands, parks, and agricultural land across Europe, North Africa, Central Asia, and North America.

Diet & Feeding

Adults feed on nectar from various flowers; larvae are polyphagous, feeding on a wide range of herbaceous plants and grasses.

Behavior Patterns

Strictly nocturnal adults are strongly attracted to light. The species is known for its migratory behavior. The cryptic forewings provide camouflage at rest, while the bright yellow hindwings serve to startle predators when the moth takes flight.

Risks & Benefits

Generally harmless to humans. In the larval stage (known as a cutworm), it can occasionally be a minor agricultural pest by damaging the roots and stems of vegetable crops. They serve as a vital food source for birds and bats.