Giant Swallowtail Caterpillar: The "Orangedog"

The creepy, bird-dropping mimics on your citrus are giant swallowtail caterpillars (Papilio cresphontes). They feed on citrus family plants and are called "orangedogs."

Instead of killing them, relocate caterpillars with a few leaves to a safe outdoor spot. They'll form chrysalides and emerge as stunning black-and-yellow butterflies.

See Firefly Forest for life-cycle photos.