Butterflies and Dragonflies - Jerry Barton
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Scarce Swallowtail

Scarce Swallowtail

Scarce Swallowtail
Found along a trail on the "Danube Island" in Vienna. First one of these (with the front wings bulging out in front) that I've seen. In German they are separated from other Swallowtails and are called "Sail Butterflies" (Segelfalter). Their flight is strange to see.

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