Q: What kind of caterpillar is this? It looks similar to a monarch butterfly caterpillar but I know it is not.

A: Thank you for bringing in the caterpillar on a leafy twig so it has something to eat. The caterpillar is the larval stage of the black swallowtail butterfly. The colors on both caterpillars are white, yellow and black. The monarch caterpillar ... READ MORE