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The Giant Swallowtail Butterfly (Papilio cresphontes) is swallowtail butterfly common in various parts of North America, particularly the South and Southeast.
The caterpillar is known as the Orange Dog because it is a common pest for citrus farmers. The caterpillar has two effective adaptations for defense against birds. The first is a reddish osmeterium that is extended when the insect is bothered. The pheromones are foul-smelling and are thought to deter birds. Secondly, the coloration of the larva makes it appear to be an inconspicuous bird dropping.
The adult butterfly is quite large, with a wingspan of up to 7.4 cm for females. The wings have a striking and easily recognizeable black and yellow pattern.
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Orange Dog displaying osmeterium.
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