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A dark spot, resembling an eye, on an expendable part of an insect's body that protects the insect from predators either by deflecting attacks away from vital areas of the body, or by evincing a startle response. Many butterflies have small eyespots along the edges of their wings, others have large eyespots on the hind wings that can be exposed suddenly by moving the forewings, and some have both.

Subjects: Zoology and Animal Sciences.

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