Papilio multicaudata
The Two-tailed Swallowtail is one of the largest butterflies in North America. It looks like a tiger swallowtail at first glance, with yellow wings and black stripes, but each hindwing ends in two tails instead of one, and the black stripes are narrower.
It is a butterfly of western canyons and foothills. Males patrol up and down shaded drainages looking for females and often gather at damp ground to drink minerals. Its caterpillars feed on ash, hop tree, and chokecherry, all common in the canyons of the Trans-Pecos.
This one was floating through the oak canyon in the Davis Mountains Preserve on June 15, 2023.
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