Yellow Fever Mosquito Identification Guide
The yellow fever mosquito's lyre-shaped white markings on a dark thorax make it easy to distinguish from its striped tiger mosquito cousin.
Read the full Yellow Fever Mosquito encyclopedia entry →
Key Visual Features
The yellow fever mosquito (Aedes aegypti) is a small, dark mosquito with an ornate pattern of white scales on its thorax.
- Size: Small, roughly 4-7 mm long.
- Body color: Dark brown to black body with silvery-white scale markings.
- Signature marking: A curved, lyre- or violin-shaped pattern of white lines on the top of the thorax, distinct from the straight single stripe of the Asian tiger mosquito.
- Legs: Black legs with white banding at the joints, giving a striped appearance similar to related species.
- Abdomen: Dark with narrow white bands along the sides of each segment.
- Wings: Clear, scaled wings typical of mosquitoes, held flat over the body when resting.
Where and When You'll See It
- Found in warm, tropical and subtropical regions, often close to human dwellings.
- Prefers to breed in artificial containers holding standing water, such as flowerpots, discarded tires, buckets, and water storage containers.
- Primarily bites during the day, with peak activity in the early morning and again in the late afternoon before dusk.
- Tends to stay close to buildings and shaded areas around homes rather than open fields or forests.
Similar-Looking Bugs
- Asian tiger mosquito: Shows a single straight white stripe down the thorax rather than the curved lyre-shaped pattern.
- Culex mosquito: Generally brown and less strikingly patterned, without the sharp white lyre markings.
- Anopheles mosquito: Often rests at a distinct upward angle and has spotted wings, unlike the plain scaled wings of the yellow fever mosquito.
Quick ID Checklist
- Curved, lyre- or violin-shaped white marking on the thorax
- Dark body with white leg banding at the joints
- Narrow white bands along the sides of the abdomen
- Small size, most active during daytime hours
- Found breeding in artificial containers near homes
Frequently asked questions
How can I tell a yellow fever mosquito from an Asian tiger mosquito?
Check the thorax pattern: the yellow fever mosquito has a curved, lyre-shaped white marking, while the Asian tiger mosquito has one straight white stripe.
When is the yellow fever mosquito most active?
It bites mainly during the day, with activity peaking in the early morning and again in the late afternoon before dusk.
Where does the yellow fever mosquito prefer to breed?
It favors small artificial containers holding standing water, such as flowerpots, buckets, and discarded tires, often close to homes.
What do the leg markings look like on this mosquito?
Its legs are dark with distinct white banding concentrated at the joints, contributing to its overall black-and-white patterned appearance.