Eastern Tiger Swallowtail, Papilio glaucus

Eastern Tiger Swallowtail

Papilio glaucus

Above: bright yellow with broad black stripes; females are dimorphic, some similar to the males and others are black with extensive blue scaling on the hind wings (photos 3 & 4; notice that you can see the tiger stripes on the third photo). Below: similar to the top side, mainly yellow background with bold black stripes; dark females have a shadow of the tiger pattern evident, at least in fresh individuals.

Wooded areas and open areas near woodlands.

Overwintering Strategy:   Chrysalis

Two broods; May/June and then in late July/August. Adults can be found on the wing well into September.pa

Caterpillar Host Plants:
Wild cherry (Prunus species), Magnolia or Cucumber tree (Magnolia species), Basswood (Tilia americana), Tulip tree (Liriodendron tulipifera), Birch (Betula species), Ash (Fraxinus species), Cottonwood (Populus species), American mountain ash (Sorbus americana), and Willow (Salix species).

The Eastern Tiger Swallowtail is a very common and conspicuous butterfly of southern Wisconsin.

Overwintering Strategy

Two-way migration: Adult migrates from Wisconsin to Central Mexico
Small migration: Adult migrates from Wisconsin to southern US
Immigrant: Adult migrates into Wisconsin from warmer areas and don't fly south in winter
Adult Butterfly: Hibernates overwinter as an adult butterfly
Eggs: Eggs laid on stems, twigs or foot plants overwinter in diapause
Caterpillar: Caterpillars make nests on the base of plants and hibernate until spring
Chrysalis: Caterpillars shed their last skin, form a chrysalis and enter diapause.

For more information, read: Where Do Butterflies Go In Winter?

Further Information:   

 Design A Butterfly Garden
 Take The Butterfly Quiz
 Monarch Life Cycle
 Butterflies and Moths of North America
 Southern Wisconsin Butterfly Assn (NABA)
 The Butterfly Site

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