单词	underwing
释义	underwing /ˈʌndəwɪŋ / noun 1The hindwing of an insect, especially when it is normally hidden by a forewing.The butterflies have tiger striped underwings and little black tails on their back wings.... At last they find a huge moth with ‘great underwings of glowing crimson.’ 2The underside of a bird’s wing.They note that white plumage seen on the bird's back doesn't match the pattern of a pileated woodpecker, nor does the absence of black trailing edges on the underwings of the bird in the video.... The body coloration is typical of gull plumage from above, but both breeding and non-breeding adults have dark underwings with pale wingtips, which are distinctive in flight. In flight, the long, wedge-shaped tail and prominent white trailing edge of the wing are evident; the underwing usually appears darker than the upperwing. 3 (also underwing moth) [usually with modifier] A moth with drab forewings and brightly coloured hindwings, typically yellow with a black terminal band. Several genera in the family Noctuidae. See also yellow underwing.
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