The chalk-fronted corporal (Ladona julia) is a skimmer dragonfly found in the northern United States and southern Canada.

As they mature, males develop a white pruinescence on the top of the thorax and at the base of the abdomen, while the rest of the abdomen turns black.

Females become almost uniformly dark brown, with a dusting of gray pruinescence near the base of the abdomen; a few develop the same color pattern as the males.

Chalk-fronted corporals often perch horizontally on the ground or on floating objects in the water, flying up to take prey from the air.

They are gregarious for dragonflies, and are commonly seen perching in groups.