Larva feed on organic matter. The eggs are laid in crevices near stagnant water. The adults drink nectar and the larva prey on aphids and scale insects. Preferred habitat is meadows and fields. Eggs are laid on aphid infested foliage.
Larva are pale gray and sluglike and pupate in leaf litter.
The male drinks nectar, and the female sucks blood from mammals. Preferred habitat is woodlands, meadows and roadsides near water. Eggs are laid on plant material just above the water. Larva feed on aquatic insects and pupate in the mud. The male eats pollen and drinks nectar, and the female sucks blood from mammals.