Yellow fever mosquito identification (Aedes aegypti)


Insect identifier · Mosquitoes

How to identify a Yellow fever mosquito

Aedes aegypti
· Also called aedes aegypti, dengue mosquito, container mosquito, aedes mosquito, what does a yellow fever mosquito look like

Yellow fever mosquito identification photo

People searching “what does a yellow fever mosquito look like” are usually trying to tell Aedes aegypti from the Asian tiger mosquito in a yard or patio. This page is for that ID: markings, daytime bite pattern, and where it actually lives in the U.S.

Someone searching this page usually has a yellow fever mosquito in a photo, on skin, or in a story about yards, containers, urban. Use the marks, the bite, and the range together. People searching “what does a yellow fever mosquito look like” are usually trying to tell Aedes aegypti from the Asian tiger mosquito in a yard or patio. This page is for that ID: markings, daytime bite pattern, and where it actually lives in the U.S.

What does a yellow fever mosquito look like?

Aedes aegypti is a small black mosquito with white-banded legs. The giveaway is on the thorax: a lyre-shaped pair of curved silver-white lines, not a single straight stripe. It often rests near homes and breeds in tiny containers — birdbaths, saucers, clogged gutters, and toys.

Yellow fever mosquito (Aedes aegypti) is Small, about 4–7 mm. Colors people notice: black, white, silver. Field marks: Lyre-shaped silver-white markings on the thorax; Black-and-white banded legs; Bites during the day, often indoors or near homes; Breeds in small containers of water. It is found both. If those marks are missing, open Asian tiger mosquito, Northern house mosquito before you force this name. Search phrases that belong on this page include what a yellow fever mosquito looks like and yellow fever mosquito identification.

Identification marks

  • Lyre-shaped silver-white markings on the thorax
  • Black-and-white banded legs
  • Bites during the day, often indoors or near homes
  • Breeds in small containers of water

Size: Small, about 4–7 mm
Colors: black, white, silver
Where: both

What a typical yellow fever mosquito bite looks like

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

The bite is a small, very itchy welt. Daytime biting is the behavioral clue. Ankles, elbows, and other exposed skin get several bites in a short sitting. It is an important dengue, Zika, and chikungunya vector in some regions; a typical backyard welt still needs only local care unless fever follows travel.

People searching “yellow fever mosquito bite identification” want the pattern, not a single anonymous bump. Small, very itchy welt. Often several bites on ankles, elbows, or other exposed skin. Daytime biting is a clue. Immediate steps on this page: Wash the area with soap and water; Apply a cool compress; Use a small amount of itch-relief balm if the skin is intact; Watch for fever, severe headache, or joint pain after travel — seek care; Dump standing water in pots, gutters, and toys. 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

  1. Wash the area with soap and water
  2. Apply a cool compress
  3. Use a small amount of itch-relief balm if the skin is intact
  4. Watch for fever, severe headache, or joint pain after travel — seek care
  5. Dump standing water in pots, gutters, and toys

Yellow fever mosquito vs Asian tiger mosquito

The Asian tiger mosquito has one straight white stripe on the thorax. Yellow fever mosquito has a lyre — two curved silver lines. Both have banded legs and bite by day. Northern house mosquitoes are plain brown and bite at night. If you only remember one mark, remember lyre vs stripe.

Range and season

Established mainly in the southern U.S. and Hawaii as a warm-climate urban mosquito. Year-round in frost-free areas; late spring through fall farther north. Dump standing water weekly.

Near homes in the southern U.S. and Hawaii: patios, indoor rooms with open doors, and any cup of water that sits a week. Not a deep-woods mosquito.

Established in much of the southern U.S. and Hawaii; mostly a warm-climate, urban container breeder. Range is approximate and expanding with climate and travel.

Year-round in frost-free areas; late spring–fall farther north

Common questions

What does a yellow fever mosquito look like?

A small black mosquito with white-banded legs and a lyre-shaped silver pattern on its back. It is often found around homes and containers.

Does the yellow fever mosquito bite humans?

Yes. It is an aggressive daytime biter and a key vector of dengue, Zika, chikungunya, and yellow fever in some regions.

Where is Aedes aegypti found in the U.S.?

Primarily the Gulf Coast, Florida, parts of the Southeast, and some Southwest and Hawaiian locations. Local presence varies year to year.

What does a yellow fever mosquito bite look like?

A small, very itchy welt. Daytime bites on ankles and elbows, often several at once, are a clue.

Yellow fever mosquito vs Asian tiger mosquito?

Tiger mosquitoes have one straight white stripe on the thorax. Yellow fever mosquitoes have a lyre (two curved silver lines). Both have banded legs.

Does the yellow fever mosquito live in the United States?

Yes, mainly as an urban container mosquito in warm southern states and Hawaii. It is not a northern woods species.

Is Aedes aegypti active during the day?

Yes. Daytime bites around homes are a clue, especially mid-morning and late afternoon.

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