Papilio galucus is a species of swallowtail butterfly native to eastern North America. It is one of the most familiar butterflies in the eastern United States, where it is common in many different habitats. It flies from spring to fall, during which it produces two to three broods. Adults feed on the nectar of many species of flowers, mostly from those of the aster, daisy, cone flower, and sunflower families. P. glaucus has a wingspan measuring 3.1 to 5.5 inches.
The male is yellow with four black “tiger stripes” on each fore wing. Females may be either yellow or black, making them sexually dimorphic.