Mosquitoes: the world’s deadliest animal.
Mosquitoes belong to the family Culicidae — over 3,500 species worldwide, but only a few are dangerous to humans. Those few are responsible for more human deaths each year than any other animal on Earth, primarily through the diseases they transmit: dengue, malaria, Zika, chikungunya, and more.
The deadliest animal on the planet — and it’s not even close.
Mosquito-borne diseases kill an estimated 725,000 people every year — more than sharks, snakes, lions, and crocodiles combined. Malaria alone causes hundreds of thousands of deaths annually, mostly in children under five in sub-Saharan Africa.
In Southeast Asia, dengue fever is the dominant threat — and Malaysia is squarely in its zone.
Not all mosquitoes carry the same diseases.
Of the thousands of mosquito species worldwide, three genera dominate the disease-vector picture in Malaysia. Each prefers different breeding sites, bites at different times, and transmits different illnesses.
Day-biting, urban-loving, and the primary dengue transmitter in Malaysia. Recognised by black-and-white striped legs (“the tiger mosquito”). Breeds in tiny amounts of clean water.
The malaria carrier. Active mostly at night, with a distinctive resting posture (body angled up, away from the surface). More common in rural and forested areas of Malaysia.
The “common house mosquito.” Brown and unremarkable in appearance. Most common biting mosquito at night in urban Malaysian homes — and the primary filariasis (elephantiasis) vector.
From egg to adult mosquito in days.
Mosquitoes complete their entire lifecycle remarkably quickly — sometimes in under two weeks. All four stages depend on standing water, which is why removing breeding sites is the single most effective prevention.
Egg
~48 hours to hatchLaid by females directly on or near water — in clusters called rafts or individually. Aedes needs only a teaspoon of water to breed.
Larva (wrigglers)
5 – 14 days · 4 moltsLive in water, surfacing to breathe through a siphon tube. Feed on microorganisms and organic matter. Visible to the naked eye.
Pupa (tumblers)
2 – 3 daysNon-feeding transitional stage. Move with a tumbling motion in water. Adult body forms inside the pupal case during this short window.
Adult
Males ~1 week · Females up to 1 month+Emerges from pupal case, rests on water surface to harden. Females begin seeking blood within days; lay eggs every few days after each blood meal.
Only female mosquitoes bite. Males drink nectar.
Despite popular assumption, only female mosquitoes feed on blood — and only females transmit disease. Males have entirely different mouthparts, designed for sipping plant nectar. They never bite.
Why females need blood: they require the protein and iron in blood to develop their eggs. A single blood meal supports a batch of dozens to hundreds of eggs. After laying, females can seek another blood meal and continue the cycle every few days.
Nectar drinkers, never bite
Live ~1 week. Pollinate plants. No role in disease transmission.
Blood feeders, disease vectors
Live up to 1 month+. Need blood for egg production. Transmit all mosquito-borne disease.
How female mosquitoes find their hosts.
Female mosquitoes don’t bite randomly — they hunt by detecting specific cues from a distance. Understanding what attracts them helps explain why some people get bitten more than others.
Carbon dioxide (CO₂)
Detected from up to 50 metres away. Larger people, pregnant women, and those who exhale more (after exercise) are more attractive targets.
Body heat & odours
Skin temperature, sweat, lactic acid, and certain bacteria on skin all attract mosquitoes. Why some people are “magnets” — different microbiome.
Visual cues
Movement and dark clothing help mosquitoes home in once close. Light-coloured loose clothing reduces visibility to them.
Cases nearly doubled in one year.
Dengue isn’t a distant problem — it’s an annual reality in Malaysia. Recent figures show a sharp rise:
And the trend hasn’t stopped. The Aedes aegypti mosquito breeds in tiny pockets of stagnant water — the kind that forms in flowerpots, tyres, gutters, and discarded containers around any home.
Mosquitoes need water. Remove the water.
The single most effective mosquito prevention is eliminating breeding sites. Aedes aegypti can breed in as little as a teaspoon of standing water. Walk around your premise weekly and look for these:
Mosquitoes around your home or premise — let’s deal with them.
Our mosquito control programme combines targeted fogging, larvicide treatment of breeding sites, and ongoing prevention guidance. Especially valuable for homes with young children, elderly residents, or premises in dengue-affected areas. A free site assessment identifies the breeding sources you may have missed.
More from our pest encyclopaedia.
Other common pests you may encounter alongside mosquitoes in Malaysian homes and premises.
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