|Hey... wait a minute ...
To protect itself from predators, this species uses "bio-mimicry," a fancy word for disguise. Unlike some caterpillars who depend on hiding under leaves, or only moving when it's dark out, the Giant Swallowtail caterpillar can stay right out in the open. Most predators will think like we did — that's just a bird poop — and will not pay any more attention.
(as always, click on the pictures for larger versions)