A mosquito goes through four life stages — egg, larva, pupa, and adult — and can complete the whole cycle in about 8 to 10 days in warm weather. The first three stages all happen in standing water, which is exactly why removing standing water is the most powerful way to control them. Only adult females bite; they need a blood meal to produce eggs.
Key Takeaways
- Four stages: egg → larva → pupa → adult, roughly 8–10 days in warm conditions.
- The first three stages live in water — no standing water, no mosquitoes.
- Only females bite, and only to get the protein needed to make eggs.
- Males and unfed females feed on nectar, not blood.
- Adults live weeks, and some species overwinter as eggs or adults.
The four stages of the mosquito life cycle
1. Egg
Females lay eggs on or near standing water — singly or in floating “rafts” of up to a couple hundred. Some species’ eggs can survive dry conditions for months and hatch once they’re flooded, which is why a spell of rain can trigger a sudden hatch (CDC: Mosquito Life Cycle).
2. Larva
The egg hatches into a larva — the wriggling “wriggler” you see in stagnant water. Larvae feed on microorganisms and organic matter, breathe at the surface, and molt several times as they grow over a few days.
3. Pupa
The larva becomes a comma-shaped pupa (“tumbler”). Unlike most pupae, mosquito pupae are mobile, tumbling away when disturbed. They don’t feed, and after a couple of days the adult emerges from the pupal case at the water’s surface.
4. Adult
The emerged adult rests briefly to harden, then flies off to mate and feed. From egg to flying adult takes about 8–10 days in warm weather, faster in heat and slower when cool.
Why only females bite
Both sexes feed on flower nectar for energy. The difference is reproduction: a female needs the protein in blood to develop her eggs, so she seeks out a host while males never bite at all. After a blood meal, she rests while her eggs mature, then lays them on standing water and the cycle repeats. A single female can complete several feeding-and-laying cycles in her lifetime (University of Florida/IFAS: Mosquito biology).
Mosquito behavior worth knowing
- Peak biting times are often dawn and dusk, though some species (like the daytime-active Aedes aegypti) bite in daylight.
- Adults rest in cool, shaded, humid spots — dense shrubs, tall grass, under decks — during the heat of the day.
- They’re weak fliers, which is why a simple fan disrupts them on a patio.
- Overwintering varies: some species survive winter as hardy eggs, others as dormant adults in sheltered spots.
What the life cycle means for control
The takeaway is simple and powerful: three of the four stages happen in water, so eliminating standing water collapses the population before adults ever take flight. Treat water you can’t drain with Bti larvicide, which kills larvae specifically. The full approach is in every way to get rid of mosquitoes, and what attracts mosquitoes explains how the biting adults then find you.
Frequently Asked Questions
How long does a mosquito live?
Adult females typically live two to several weeks, depending on species, temperature, and conditions; males live shorter lives. Some species overwinter, extending their lifespan dramatically by going dormant.
How long does it take for a mosquito to grow from egg to adult?
About 8 to 10 days in warm weather, though it speeds up in heat and slows in cooler conditions. The egg, larva, and pupa stages all happen in water; only the final adult stage is airborne.
Do all mosquitoes bite?
No. Only adult females bite, and only because they need blood protein to produce eggs. Males — and females between reproductive cycles — feed on nectar.
Where do mosquitoes lay their eggs?
On or near standing water: ponds, clogged gutters, buckets, plant saucers, old tires, and any container that holds water. Eliminating these breeding sites is the most effective control method.