|The monarch butterfly caterpillar, Danaus plexippus, is a milkweed specialist that eats nothing else.|
|Monarch caterpillars come in five sizes. Each size is a different stage called an instar. Successive instars shed their skins and grow larger in abrupt steps.|
This milkweed tussock caterpillar, Euchaetes egle, will grow up to become a relatively unremarkable small brown moth.