Garry Kessler photographed black swallowtails as they progressed through their life-cycle (click on an image for a larger view, hover over the small image for a description).
'''We had two fall crops of Eastern Black Swallowtails on our parsley in Westboro. We decided to raise them but on Queen Anne's lace instead of our parsley. The black and white caterpillar is the first instar before it sheds its skip the first time. By 8/10/06 the caterpillars had grown to their black, green and yellow form.
Read MoreCraig Smith photographed this Black Swallowtail at Sedge Meadow Conservation Area in Wayland (click on image for a larger view).