Giant swallowtail caterpillar

Giant swallowtail caterpillar

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Caption: Caterpillar of the giant swallowtail, Papilio cresphontes, with its scent horns (osmateria) extended. Early stages resemble a fresh bird dropping and this caterpillar is highly dependent upon its camouflage for protection, but when disturbed it extends its normally hidden scent horns. They produce a foul smelling substance that is thought to deter predation. Giant swallowtail butterflies are found over a large portion of the southeastern US, west and south into much of South America. During summer it extends its range northward as far as Canada. Photo, Dallas, Texas, USA, on a citrus, a plant that this caterpillar is often a pest of. In citrus growing regions this caterpillar is often known as the 'orange dog'.

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Keywords: arthropod, bird-dropping mimic, butterfly caterpillar, butterfly larvae, camouflage, citrus plant, citrus sp., crypsis, cryptic insect, defence strategy, defensive mechanism, giant swallowtail, host plant, insect, insect larva, insect life cycle, invertebrate, late instar, lepidoptera, osmeteria, osmeterium, papilio, papilio cresphontes, papilionindae, predator deterrent, scent horns, texan wildlife, texas fauna

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