How to identify a Cattail mosquito

Coquillettidia perturbans
· Also called cattail mosquito, mansonia-like, perturbans, marsh mosquito, wetland mosquito

Dusk bites at marsh edges when backyard buckets are empty often mean cattail mosquitoes (Coquillettidia perturbans). Larvae take air from plant roots, so some dunks fail.

Someone searching this page usually has a cattail mosquito in a photo, on skin, or in a story about cattails, marshes, dusk. Use the marks, the bite, and the range together. Dusk bites at marsh edges when backyard buckets are empty often mean cattail mosquitoes (Coquillettidia perturbans). Larvae take air from plant roots, so some dunks fail.

What does a cattail mosquito look like?

Golden-brown or salt-and-pepper mosquito with broad pale bands on the legs. Tied to cattail marshes, not patio saucers.

Cattail mosquito (Coquillettidia perturbans) is Medium. Colors people notice: brown, yellow, tan. Field marks: Salt-and-pepper or golden-brown look; Broad pale bands on the legs; Strong dusk biter near wetlands; Associated with cattails, not backyard buckets. It is found outdoor. If those marks are missing, open Inland floodwater mosquito, Northern house mosquito before you force this name. Search phrases that belong on this page include what a cattail mosquito looks like and cattail mosquito identification.

Identification marks

Salt-and-pepper or golden-brown look
Broad pale bands on the legs
Strong dusk biter near wetlands
Associated with cattails, not backyard buckets

Size: Medium
Colors: brown, yellow, tan
Where: outdoor

What a typical cattail mosquito bite looks like

Typical cattail mosquito bite or sting — A typical pattern. Reactions vary. This is a guide photo, not a diagnosis.

Painful-itchy mosquito bites in a wave at sunset on wetland edges.

People searching “cattail mosquito bite identification” want the pattern, not a single anonymous bump. Painful-itchy mosquito bite; people often notice a wave of bites at marsh edges at sunset. Immediate steps on this page: Leave the marsh edge at peak dusk if you can; Soothe bites; watch for unusual swelling; Plan clothing and repellent before sunset near wetlands. This species does bite or sting people. Fever, spreading redness, trouble breathing, or a child with many stings is professional care.

If you were bitten

Leave the marsh edge at peak dusk if you can
Soothe bites; watch for unusual swelling
Plan clothing and repellent before sunset near wetlands

Cattail mosquito vs Inland floodwater mosquito

If dunks in the birdbath did nothing and you are eaten at a marsh at sunset, think cattail mosquito. Larvae get air from plant roots, so some backyard products miss them.

Inland floodwater mosquito identification (Aedes vexans)
Northern house mosquito identification (Culex pipiens)
Common malaria mosquito identification (Anopheles quadrimaculatus)

Range and season

East and Midwest wherever cattails persist. Peak midsummer evenings.

Cattail marshes, lake edges, and wetland parks in the East and Midwest.

Across much of the East and Midwest wherever cattail marshes occur. Larvae attach to plant roots rather than hanging at the water surface.

Peak midsummer evenings

Common questions

Why don’t dunks work on cattail mosquitoes?

Larvae take air from plant roots, so surface treatments and some dunks are less effective than for other mosquitoes.

Where do they breed?

Permanent or semi-permanent marshes with cattails and similar plants.

Are they a disease risk?

They can play a role in some virus cycles; for most people they are a fierce dusk nuisance.

Why don’t mosquito dunks work at the lake?

Cattail mosquito larvae take oxygen from plant roots, not the water surface, so surface dunks can fail.

When do cattail mosquitoes bite?

In a wave at dusk on wetland edges, often midsummer.

Cattail mosquito identification (Coquillettidia perturbans)