Description
The life history of a mosquito includes four distinct stages—egg, larva, pupa, and adult—comprising a complete metamorphosis.
Stages of Mosquito Life Cycle
Egg: Female mosquitoes lay 100–400 eggs on the surface of stagnant water or in moist environments likely to flood. Eggs are laid singly (Anopheles, Aedes) or in rafts (Culex), and hatch within 2–3 days depending on temperature. Some eggs can survive dry conditions for months.
Larva (“Wriggler”): Larvae are aquatic, elongated, and highly active, feeding on algae, microorganisms, and organic debris. They molt four times (larval instars), use siphons or trumpets for breathing, and surface regularly for air. The larval stage typically lasts 7–10 days.
Pupa (“Tumbler”): Pupae are comma-shaped and move actively in water but do not feed. Breathing occurs via dorsal trumpets exposed at the water's surface. The pupal stage lasts 2–6 days depending on environmental conditions.
Adult (“Imago”): The mosquito emerges from the pupal case, rests on the water’s surface to harden wings, and then flies away. Adults live for 2–4 weeks, feed on nectar (males) or blood (females), and reproduce rapidly. Females require blood meals for egg production.
Additional Details
All stages except adults are aquatic and require water for development.
The complete mosquito life cycle can be finished in 7–15 days under optimal conditions.
Female mosquitoes are responsible for biting humans and other animals to obtain protein from blood for egg development.
Multiple generations can occur each year in warm climates, leading to rapid population growth.
Understanding the mosquito life cycle is key to controlling infestations and disease transmission.