Sunday, August 06, 2006

Tiger Swallowtail (Pterourus glaucus)


There are six swallowtails in the Midwest and the tiger is the only one which is yellow. The male is always yellow but the female is dimorphic either yellow or black. The black female mimics the Pipevine Swallowtail which is distasteful. Tiger Swallowtails nectar on several plants both domestic and wild. The one pictured is nectaring on Butterfly Bush.

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