A male Black Swallowtail Butterfly found in Ottawa, Ontario, Canada. The Black swallowtail butterfly is also known by other names such as the American Swallowtail or the Parsnip Swallowtail. This specie of Swallowtail Butterfly is common in the North American region. Both males and females have two rows of yellow spots on their lower wings but these spots are brighter and larger in males.
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