Aedes aegypti Mosquito: How to Identify It and Its Life Cycle

You identify an Aedes aegypti by its markings, not its size or its buzz: a small black mosquito with white leg stripes and a harp-shaped white pattern — the “lyre” — on its upper back. That is the dengue vector most Malaysians will ever meet, and knowing the ID matters practically: it tells you whether the mosquito in your house is a daytime disease risk or a night-time nuisance. This page is the field guide (the species’ history and disease role are in the aedes aegypti profile).

Identification at a glance

Feature	Aedes aegypti (dengue vector)	Culex (house mosquito)
Body colour	black with white markings	brownish-grey, no pattern
Back marking	white lyre (harp) shape	none
Legs	white bands on every segment	plain, unstriped
Posture at rest	flat, parallel to surface	hunches head-down
Active hours	day ^{[who-dengue-day-biter]}	night
Breeding water	clean stagnant water in containers	dirty water, drains

The “is the dengue mosquito bigger?” question comes up constantly — the answer is no, and the full size discussion (including why size myths spread) is in aedes mosquito size. If you prefer pictures to words, the cartoon-and-imagery explainer — nyamuk aedes kartun — walks the visual features used in school and KKM campaign material.

The four life stages, and where you intervene

Egg — laid on the damp walls of water-holding containers, just above the waterline. Glued down, drought-resistant, viable for months. Intervention: scrub the walls, not just empty the water.
Larva — hatches after rain refills the container; the familiar wiggler hanging from the surface. Intervention: any container you cannot empty should be sealed or treated.
Pupa — the non-feeding tumbler stage; transforms in a couple of days.
Adult — emerges, mates, and the female seeks blood meals in daytime ^{[who-dengue-day-biter]}. Intervention: screens, traps, and the compound routine.

In Malaysian heat the full egg-to-adult cycle completes in about a week — the single number that justifies the weekly search-and-destroy rhythm, and the reason the breeding page is written around seven-day intervals.

Aedes aegypti vs Aedes albopictus (the other Malaysian vector)

Both are black-and-white striped, and both can carry dengue — albopictus is the secondary vector. The practical differences: aegypti is more domestic (breeds in your yard and home, bites indoors and around people), while albopictus tolerates outdoor and vegetated habitats (nurseries, orchards, parks) and often has silvery-white dorsal stripes that read slightly brighter. For household decisions the split matters little — both breed in containers, so both are controlled by the same weekly routine.

What an infected mosquito looks like (spoiler: nothing)

A mosquito carrying the dengue virus is visually identical to one that is not — the virus changes nothing you can see. After feeding on an infected person, the mosquito needs roughly eight to twelve days before it can transmit ^{[who-dengue-eip]}. This is why “kill anything that looks like Aedes” is the wrong frame: the honest strategy is denying every Aedes a water nursery, which removes both the safe ones and the dangerous ones alike.