Ecological correlates of polyphenism and gregarious roosting in the grass yellow butterfly Eurema elathea (Pieridae).

Abstract excerpt

Eurema elathea adults were census weekly (1992-1994) in six night-roosts around a forest fragment on a farm, and in two roosts in the urban area of Uberlândia, Minas Gerais, Brazil. Males were grouped in six phenotypic classes. These were based on a range between having a conspicuous wide black bar at the dorsal forewing inner margin (wet season dark morphs) and the absence of that bar (dry season light morphs)....

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