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How does the sun bittern use its wings during display?
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Gruiform
White-naped crane (Grus vipio).
The sun bittern (Eurypyga helias) is a member of the order Gruiformes that possesses strikingly patterned wings marked in browns, yellows, black, and white. During courtship and threat displays, the male spreads these wings to showcase their vibrant coloration.1