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Red underwing

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description Red underwing Overview

The red underwing, Catocala nupta, is a large moth found across much of Europe and parts of Asia, including Britain. At rest, its gray and brown forewings resemble tree bark and conceal vivid red hindwings crossed by black bands. When disturbed, the sudden display of color can startle a predator, after which the moth closes its wings and becomes difficult to locate against a trunk; its caterpillars feed mainly on poplars and willows.

help Red underwing FAQ

How did the red underwing moth get its name?

The red underwing, *Catocala nupta*, gets its name from its vivid red hindwings, which are crossed by black bands. At rest, however, these bright colors are completely hidden beneath gray and brown forewings that resemble tree bark.

What is the defensive mechanism of the red underwing moth?

When a predator disturbs the moth, it suddenly displays its bright red hindwings. This startling flash of color can momentarily confuse or frighten the attacker, giving the moth a crucial opportunity to escape.

Where is the red underwing moth typically found?

This large moth is found across much of Europe and parts of Asia, including a widespread distribution throughout Britain. It typically inhabits woodlands, gardens, and areas where its larval food plants, like willows and poplars, are abundant.

When do red underwing moths fly in the UK?

In the United Kingdom, the red underwing is typically on the wing from late July through to October. They are strongly attracted to light and sugary substances, making them frequent visitors to moth traps and gardens at night.

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