Coquillettidia is a mosquito genus erected by entomologist Harrison Gray Dyar Jr. in 1904 based primarily on unique features of its "peculiar" male genitalia.

Not all species have been well documented, but females of some are known to feed primarily on birds but will also bite cattle.

They occasionally attack humans during daylight hours in shady places when their habitat is entered.

[2] Adult females lay their eggs on the surface of water in areas of emergent vegetation to which hatchling larvae attach themselves with a modified siphon, on the roots or submerged stems, and where they remain throughout development; pupae also attach themselves the plants by means of a modified respiratory trumpet, and remain there until the adult is ready to emerge.

Austromansonia occurs only in New Zealand, while species of subgenus Rhynchotaenia are confined to the Neotropical Region.