red underwing

British  

noun

1. a large noctuid moth, Catocala nupta , having dull forewings and hind wings coloured red and black

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Example Sentences

Notoriously poor fliers, lanternflies flash bright red underwings when they hop or run, a practice believed to help ward off potential predators.

From Washington Post

And the red underwing had circled round the light and flashed and gone.

From Project Gutenberg

The red underwing had never come back, though Jacob had waited.

From Project Gutenberg