No, mosquito hawks do not eat mosquitoes. Despite the nickname, these insects (actually crane flies) are physically incapable of killing or consuming mosquitoes. They lack the mouth anatomy to eat other insects, and most adults barely eat anything at all during their brief lives.
Why They’re Called Mosquito Hawks
Crane flies earned the nickname “mosquito hawk” (along with “skeeter eater,” “gallinipper,” and “gollywhopper”) purely because of how they look. They resemble giant mosquitoes, with long spindly legs and a similar body shape, so people naturally assumed they must be the mosquito’s predator. The logic feels intuitive: big mosquito-looking thing must eat little mosquitoes. But the resemblance is coincidental. Crane flies belong to an entirely different family of flies, and their biology has nothing to do with hunting.
What Crane Flies Actually Eat
Adult crane flies have mouthparts designed only for sponging up liquids. They can drink water from dew or sip nectar from plants, but that’s about it. Many species don’t eat at all as adults. They live only a few days to two weeks, just long enough to mate and lay eggs. Eating is essentially optional when your entire adult life is measured in days.
Their larvae are a different story, though still not the mosquito predators you might hope for. Crane fly larvae, called leatherjackets, live in soil and feed on the roots, crowns, and shoots of grass plants. They can grow up to 1.5 inches long and cause real damage to lawns, especially during cool, wet springs. The University of Kentucky notes that some larval crane flies are predatory and may occasionally eat mosquito larvae, but this is rare and not their primary food source. Leatherjackets are far more likely to be chewing on your turfgrass than hunting anything.
Crane Flies Can’t Bite You Either
While we’re clearing up myths: crane flies don’t bite. Even though they have a short proboscis, it’s not built for piercing skin. They’re completely harmless to people and animals. The only real nuisance they cause is larval damage to lawns and garden plants. Leatherjackets have been reported damaging cereals, flower seedlings, peppermint, and turfgrasses. Birds and skunks sometimes add to the lawn destruction by digging up grass to eat the larvae underneath.
Insects That Actually Eat Mosquitoes
If you’re looking for a natural mosquito predator, several species do the job, though none are as effective as people tend to believe.
Mosquitofish are the most efficient natural predator of mosquito larvae. These small freshwater fish (females grow up to 2.5 inches, males up to 1.5) consume 42 to 167% of their body weight in prey daily, including mosquito larvae. Mosquito control districts across the United States stock them in canals and ponds. A single female can produce 10 to 300 live young per brood, with three to six broods per season, so populations establish quickly.
Dragonflies eat mosquitoes in both their adult and larval stages. Their aquatic larvae, called naiads, are aggressive predators that target mosquito larvae in the water. The naiad stage can last up to six years, and this is when dragonflies do the most damage to mosquito populations. Adult dragonflies catch mosquitoes on the wing, but not in numbers large enough to significantly dent a local population.
Elephant mosquitoes (Toxorhynchites) are one insect that genuinely deserves the “mosquito killer” reputation. Their larvae are aquatic predators that specifically target other mosquito larvae. A single larva can consume thousands of prey items during its development. The adults feed only on nectar and fruit, never on blood, which means they don’t spread disease.
Bats and purple martins get a lot of credit as mosquito hunters, but the reality is underwhelming. Studies of bats in the wild show mosquitoes make up less than 1% of their diet; they prefer beetles, wasps, and moths. Purple martins are even less helpful, with mosquitoes comprising 0 to 3% of what they eat.
Why Permanent Water Has Fewer Mosquitoes
One practical takeaway from mosquito biology: mosquitoes rarely breed in permanent bodies of water like ponds and canals. These habitats support established communities of fish, dragonfly naiads, and other predators that eat mosquito larvae before they can mature. Mosquitoes thrive in temporary standing water, like flower pot saucers, clogged gutters, old tires, and birdbaths, where no predators live. Eliminating these small water sources around your home does far more to reduce mosquitoes than any single predator species can.