A crane fly — nicknamed "mosquito hawk" or "mosquito eater" — is not a giant mosquito and does not eat mosquitoes. It is a large, harmless fly that does not bite or sting. Mosquitoes are small, and only females bite. It is a common myth.
If you have ever seen a huge, long-legged insect bumping around a porch light and assumed it was a monster mosquito, you are not alone. That insect is almost always a crane fly, and the easiest way to keep the two straight is a simple Size-and-Sting test: crane flies are big and never sting, while mosquitoes are small and only the females bite. Everything else — the leggy look, the folk names — is where the confusion starts. For more on the biters themselves, see our overview of mosquitoes.
Is a Mosquito Hawk a Giant Mosquito?
No. "Mosquito hawk" and "mosquito eater" are folk names for the crane fly, and both are misleading. A crane fly is not a giant mosquito and is not a mosquito at all — it is a separate, harmless fly that happens to have very long, fragile legs and a superficial resemblance to an oversized mosquito. University extension sources describe this mix-up as one of the most persistent insect myths.
Crucially, a crane fly does not bite or sting. It does not take blood meals, so it cannot cause the itchy welts people associate with mosquitoes. Many adult crane flies eat little or nothing during their short adult lives. So while the nickname sounds fearsome, the animal itself is one of the most harmless insects you will meet indoors or out.
Crane Fly vs Mosquito: Key Differences
The two insects differ in size, behavior, and risk. A crane fly is large, clumsy, and harmless; a mosquito is small and — in the case of the female — a biter. Here is how they line up side by side.
Crane Fly vs Mosquito — Side by Side
Feature
🦟 Crane Fly
🦟 Mosquito
Size
Large, with very long, thin, fragile legs.
Small and slender by comparison.
Does it bite?
No — does not bite or sting; harmless.
Only the female bites; males feed on nectar.
Why it feeds
Many adults eat little or nothing; no blood meals.
Female needs a blood meal to produce eggs.
Disease risk
None — carries no human disease.
Can transmit disease; mosquitoes are the deadliest animals to people.
The "hawk" myth
Does not hunt or eat mosquitoes.
Not controlled by crane flies in any way.
The clearest split: a crane fly is big and harmless; a mosquito is small and only the female bites.
Because the itch from a real mosquito bite is an immune reaction to proteins in the mosquito's saliva — not the puncture itself — a bug that never breaks your skin cannot cause it. If something big and leggy landed on you and did nothing, it was a crane fly. To learn what genuine bites look and feel like, see mosquito bites.
Do Crane Flies Eat Mosquitoes?
No. This is the heart of the myth. Despite being called "mosquito eaters" and "mosquito hawks," adult crane flies do not hunt or eat mosquitoes and do nothing to reduce mosquito numbers. The names come from folklore and the crane fly's resemblance to a giant mosquito, not from any real predatory behavior.
If you actually want fewer mosquitoes, the reliable levers are the mosquito's own biology — not crane flies. Only females bite, and they need standing water to complete their life cycle, so removing standing water is the single most effective control. You can read more about the biters in the Asian tiger mosquito and about their short lifespans in how long mosquitoes live.
The Bottom Line
A crane fly ("mosquito hawk" / "mosquito eater") is not a giant mosquito and does not eat mosquitoes.
Crane flies do not bite or sting and carry no disease — they are harmless.
Only female mosquitoes bite; they need a blood meal to produce eggs.
The "mosquito eater" name is a myth. To actually cut mosquito numbers, eliminate standing water rather than relying on crane flies.
Frequently Asked Questions
Is a mosquito hawk a giant mosquito?
No. A mosquito hawk, also called a mosquito eater, is the common name for a crane fly. A crane fly is not a giant mosquito and is not even a mosquito. It is a separate, harmless fly with very long, thin legs. It does not bite people and does not carry disease. The resemblance to a large mosquito is only superficial, which is where the myth comes from.
Do crane flies eat mosquitoes?
No. Despite the names mosquito hawk and mosquito eater, adult crane flies do not hunt or eat mosquitoes. Many adult crane flies eat little or nothing at all during their short adult lives. The idea that they control mosquito populations is a common myth with no basis in their biology.
Do crane flies bite or sting?
No. Crane flies do not bite or sting people. They are harmless. Unlike mosquitoes, they do not take blood meals, so they cannot leave the itchy, raised welts that female mosquitoes cause. If a large, long-legged insect landed on you and did nothing, it was almost certainly a crane fly, not a mosquito.
How do I tell a crane fly from a mosquito?
Size and behavior are the giveaways. A crane fly is much larger, with very long, fragile legs, and it does not bite. A mosquito is small, and only the female bites in order to get a blood meal to produce eggs. If the insect is big, clumsy, and harmless, it is a crane fly; if it is small and it bit you, it was a female mosquito.
Why is a crane fly called a mosquito eater?
The names mosquito eater and mosquito hawk come from folklore and the crane fly's superficial resemblance to a huge mosquito. The names are misleading. Crane flies do not eat mosquitoes and do not hawk or hunt them. University extension sources describe this as one of the most persistent insect myths.
Which mosquitoes actually bite people?
Only female mosquitoes bite. They need a blood meal to produce eggs, while males feed on nectar. The itch that follows a bite is an immune reaction to proteins in the mosquito's saliva, not the puncture itself. Crane flies do neither, which is another reason they are harmless.
Sources
CDC — About Mosquitoes (only female mosquitoes bite; the itch is an immune reaction to saliva; mosquitoes are the deadliest animals to people).
EPA — Mosquito Life Cycle (larvae develop in standing water; removing standing water is the most effective control).