🌱 Monarch (Danaus plexippus) vs black swallowtail (Papilio polyxenes) - can you spot the difference? 🌱 Here are a few ways you can tell these two caterpillars apart! 🔎 Look at the patterns: A monarch caterpillar has yellow, black, and white stripes along its body. In later growth stages, a black swallowtail has green and black bands with yellow spots. 🔎 Look at the tentacles: Two pairs of black tentacles are located on the front and back of a monarch catapillar. A black swallowtail caterpill