What Eats Mosquitoes? Natural Predators vs. Myths

Quick answer

Mosquitoes have plenty of natural predators, but the most effective ones work in the water, on the larvae: mosquitofish (Gambusia), which can eat up to about 100 larvae a day, and dragonfly larvae. Among adult-mosquito eaters, dragonflies are the standouts. The famous "mosquito-eaters" — bats and purple martins — are mostly myth: studies show mosquitoes are a tiny share of their diet, nowhere near the "1,000 a night" or "2,000 a day" claims. Bottom line: predators help in the wider ecosystem, but none will reliably clear your own backyard — that takes targeted control.

Real predators vs. myths

The mosquito-predator myths (what the studies actually say)

Two "mosquito-eaters" get repeated everywhere — and both are largely myths:

Bats don't eat 1,000 mosquitoes a night. That number traces back to a 1960 Harvard lab study where bats were placed in a closed room containing only mosquitoes and no other prey; a single standout bat caught about 10 a minute for 15 minutes, and the figure got extrapolated and exaggerated over the years. In the real world, mosquitoes are a small part of a bat's diet. Bats do eat some — one analysis detected mosquito DNA in about 72% of little brown bat samples — but putting up a bat house won't clear your yard. (Mississippi State Extension · VDCI)

Purple martins don't eat 2,000 mosquitoes a day either. The Missouri Department of Conservation notes that no ornithological research has found mosquitoes make up more than 3% of a martin's diet, and the Purple Martin Conservation Association itself says martins don't eat a large number of mosquitoes — they mostly catch dragonflies, flies and other larger daytime insects. (Ironically, they eat dragonflies, which are far better mosquito hunters.)

The takeaway isn't "predators are useless" — it's that no single backyard predator is a control strategy. Nature keeps mosquitoes in check across a whole ecosystem, not in one yard on one summer evening.

Predators in the Water: Who Eats Mosquito Larvae

Most real mosquito predation happens before mosquitoes can fly, in the standing water where larvae grow.

• Dragonfly nymphs. Young dragonflies live underwater and feed on aquatic insects, including mosquito larvae (University of Maine Extension). In container experiments, a single nymph ate an average of 40 larvae a day (Priyadarshana & Slade, 2023, Journal of Animal Ecology).
• Mosquitofish (Gambusia). One adult can eat up to about 100 mosquito larvae a day (UF/IFAS), and some mosquito-control districts hand them out for ornamental ponds, troughs and neglected swimming pools. The catch: introduced populations have contributed to declines of threatened native species, they eat tadpoles (USGS), and releasing them into natural waters is illegal in several states. In Florida, UF/IFAS names native larva-eaters such as the least killifish and sailfin molly.
• Toxorhynchites, the mosquito that eats mosquitoes. Its larvae are predators that feed on other mosquito larvae, while the adults feed on nectar and don't bite (UF/IFAS Extension).
• Tadpoles. In lab experiments, tadpoles reduced the growth and survival of mosquito larvae sharing their water, mostly by competing for food rather than eating them (Mokany & Shine, 2003, Oecologia).
• Copepods and turtles (special cases). Tiny crustaceans called copepods, and even juvenile turtles, have been used to clear larvae from household water-storage tanks in community programs in Central America (Borjas et al., 1993, Journal of Medical Entomology). That works in a closed tank, not in a backyard, and turtles can carry Salmonella.

Predators in the Air: Who Eats Adult Mosquitoes

• Dragonflies. Adults catch flying mosquitoes on the wing (University of Maine Extension). Don't confuse them with crane flies, the harmless "mosquito hawks" that eat no mosquitoes at all.
• Spiders. Web-builders catch mosquitoes by chance, but many spiders, including wolf, crab and jumping spiders, hunt actively without webs (Colorado State University). One East African jumping spider, Evarcha culicivora, specifically picks blood-fed female mosquitoes over other prey (Jackson et al., 2005, PNAS).
• Bats. They eat mosquitoes often but not in bulk: a Wisconsin DNA study found mosquitoes in about 72% of little brown bat samples (Wray et al., 2018, Journal of Mammalogy), which shows how often bats eat them, not how many. UF/IFAS notes mosquitoes make up only a small portion of their diet.
• Birds. Swallows, swifts and martins catch flying insects, mosquitoes included, but one mosquito-control district puts it bluntly: there's no evidence any bird species can control an insect pest at peak abundance (Benton County Mosquito Control District).
• Frogs and toads. Adult frogs eat surprisingly few. A German study of more than 2,000 frogs found mosquitoes made up less than 1% of their diet.

Why Natural Predators Can't Clear Your Yard

Every predator on this list helps the wider ecosystem, but none keeps pace with mosquitoes during peak season. Mosquitoes can go from egg to adult in 7 to 10 days, faster than dragonflies can mature and multiply, and UF/IFAS notes that birds and bats can't significantly reduce mosquito numbers at peak abundance (UF/IFAS).

So welcome dragonflies and leave spiders be, but rely on what you control: empty standing water weekly (see mosquito larvae for where they breed), plan outdoor time around when mosquitoes are most active, and use a trap to keep numbers down through the season. Mosquito TNT 2.0 releases carbon dioxide, the cue mosquitoes use to find a host, and traps the ones that land on the liquid; our mosquito traps compared guide covers the other options.

Related reading

• How long do mosquitoes live? Male, female & winter lifespans
• Mosquito hawks: are crane flies actually giant mosquitoes?

Frequently asked questions

What animal eats the most mosquitoes?

At the larval stage, mosquitofish (Gambusia) are the heavyweight, eating up to about 100 larvae a day, which is why mosquito-control districts have long used them. Among flying predators, dragonflies do the most work. Both target mosquitoes far more reliably than bats or birds.

Do bats really eat mosquitoes?

They eat some, but not the legendary 1,000 a night — that figure comes from a 1960 lab study with no other prey available. In the wild, mosquitoes are only a small part of a bat's diet, so a bat house isn't a mosquito-control plan.

Do purple martins control mosquitoes?

Not really. No study has found mosquitoes above about 3% of a purple martin's diet; they mostly eat larger insects like dragonflies and flies. The "2,000 mosquitoes a day" claim is a myth.

Are dragonflies good for mosquito control?

Yes — they're among the best. Dragonfly larvae eat mosquito larvae in the water, and adults catch adult mosquitoes in the air. They help, but they can't fully clear a yard on their own.

Should I add mosquitofish to my pond?

Only with caution. Gambusia eat lots of larvae but are invasive in many areas and will also eat native fish and amphibian young, and releasing them into creeks, lakes or other natural waters is illegal in several states. For a natural pond, encouraging dragonflies is usually the safer choice.

What eats mosquito larvae?

Dragonfly nymphs, mosquitofish and other small fish, the predatory larvae of Toxorhynchites mosquitoes, and tiny crustaceans called copepods all eat mosquito larvae. Tadpoles also suppress larvae by competing with them for food. In a backyard, though, dumping standing water beats relying on any of them.

Do frogs eat mosquitoes?

Very few. A German study of more than 2,000 frogs found mosquitoes made up less than 1% of their diet. Tadpoles do more by out-competing mosquito larvae for food in shared water.

Can natural predators alone keep my yard mosquito-free?

No. Predators help balance the wider ecosystem, but none will reliably protect a single backyard. The dependable approach is to combine source control (remove standing water), screens and a fan indoors, and a CO2 bait-and-trap like Mosquito TNT 2.0 outdoors.

Sources

• University of Florida IFAS, "Mosquitofish" (FA202). ufl.edu
• U.S. Geological Survey, Nonindigenous Aquatic Species: Gambusia affinis. usgs.gov
• Oregon State University (2022). Releasing non-native fish to control mosquitoes often ineffective. oregonstate.edu
• Alameda County Mosquito Abatement District, Biological control. mosquitoes.org
• University of Maine Cooperative Extension, Dragonflies and damselflies. umaine.edu
• Priyadarshana, T.S. & Slade, E.M. (2023). Journal of Animal Ecology 92:1589.
• UF/IFAS Extension Manatee County (2025). "The beneficial insects you don't see." ufl.edu
• Mokany, A. & Shine, R. (2003). Oecologia 135:615–620.
• Borjas, G. et al. (1993). Journal of Medical Entomology 30(5):943. oup.com
• Colorado State University, Spiders. colostate.edu
• Jackson, R.R., Nelson, X.J. & Sune, G.O. (2005). PNAS 102:15155. PubMed
• Griffin, D.R., Webster, F.A. & Michael, C.R. (1960). Animal Behaviour 8:141–154.
• Wray, A.K. et al. (2018). Journal of Mammalogy 99(3):668–674. oup.com
• Missouri Department of Conservation (2006). "Purple Martin Mania." mo.gov
• Purple Martin Conservation Association, Purple Martin basics. purplemartin.org
• Benton County Mosquito Control District, Mosquito myths. mosquitocontrol.org
• UF/IFAS, Sustainability and mosquitoes. ufl.edu