Eggs   | Small caterpillars |   Large caterpillars |   Chrysalis |   Hatching |   Old age

This caterpillar's egg was deposited on the underside of a milkweed leaf in a busy Honesdale alley. Grit from the alley surrounds the eggshell, which weighed about 0.54 milligrams when it was laid.

Eating the eggshell supplies useful protein. Thereafter the caterpillar will feed entirely on milkweed, growing from one-sixteenth of an inch (its length in the photograph) to 1.5 inches before making a chrysalis. From egg to chrysalis takes about two weeks in mid-summer