Black swallowtail

Male Black Swallowtail on a zinnia flower. The upper row of large yellow dots is a distinctive feature of the males. 

Another male Black Swallowtail, nectaring on milkweed.

This is a female Black Swallowtail. The upper row of yellow dots is not as large as in the males, and females have more blue at the bases of their wings.

Black Swallowtails are common and widespread from April through October.

Black Swallowtail resting in the grass at Beavercreek Wildlife Area.