List of butterflies of North America (Papilionidae)

They like to feed on various flowers, dung, and urine, and males like to puddle on damp ground.

The eggs are round and usually laid singly on different kinds of host plants.

The larvae have a reddish-orange forked gland, called an osmeterium just behind the head.

When frightened, the larva thrusts the gland out releasing a foul odor that will sometimes deter a predator.

It is held upright by a silken loop around the middle called a girdle.