article: Black Swallowtail
links: Arizona Asclepias incarnata Human Mate DNA Lepidoptera Asclepias syriaca Animal Nevada North Dakota Canada Dipsacus sylvestris Peru Syringa Arthropod Insect Papilionidae North America Orange (color) Mexico Zinnia Trifolium pratense Medicago sativa Florida Rocky Mountains California Manitoba Asclepias tuberosa Costa Rica Europe