The Giant Swallowtail (Papilio cresphontes) is the largest butterfly species in North America, with a wingspan of 4 to 6 inches. 

The larval host plants of Giant Swallowtails are trees in the citrus family including Lemon, Lime, Orange, Prickly Ash, Hoptree and also Common Rue.

These caterpillars have an interesting sort of protection from predators, having the look of bird droppings.

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