Although these little critters are technically insects, they're just so darn cute that it doesn't really matter. Plus they look like Pokémon.
According to the University of Florida, these colorful caterpillars are spicebush swallowtail larvae and can be found throughout the eastern half of the U.S. They change color dramatically throughout their lifecycle, going from brown to bright green, and then finally shifting into deep reddish-orange before transforming into a butterfly. The bugs are usually found on spicebush or sassafras plants.
Does this picture bring back memories from your card-trading days? Let us know in the comments below!