The Halloween pennant (Celithemis eponina) is a species of dragonfly in the family Libellulidae.

[5][7] It ranges as far north as southern Canada and as far west as the United States east of the Rocky Mountains, in New Mexico and Colorado.

It lives in wet habitat types such as ponds, marshes and lakes, where it perches on vegetation.

[6][8] The female lays eggs in the morning on open water with the male still attached at the head.

[5] They usually rest upon the leaves of the American Holly Bush which help to stimulate arousal encouraging the males to develop erections.