BuzzSkito Mosquito & Tick Control Specialists · Published July 12, 2026
Why Only Females Bite
Both male and female mosquitoes drink nectar for everyday flight fuel — sugar is their main food. What sets the female apart is reproduction. To build a batch of eggs, she needs a concentrated source of protein and iron that nectar simply cannot provide, and blood is the richest source available. So a female seeks out a warm-blooded host, pierces the skin with a slender proboscis, and draws a blood meal. A few days later, with the eggs matured, she lays them in or beside standing water and often goes hunting for another meal to fuel the next clutch.
The male never does any of this. His mouthparts are soft and feathery, physically unable to pierce skin, and he has no reproductive reason to. He spends his short adult life feeding on flowers and searching for females to mate with. That is the entire reason the “do mosquitoes bite” question always comes down to the female.
How to Tell Them Apart
Under a hand lens, the difference is obvious. The male’s antennae are plumose — thick, bushy, and almost furry — because they are packed with sensors that pick up the specific wingbeat frequency of a female flying nearby. The female’s antennae are thin and plain. Males also carry feathery palps flanking the mouth, whereas the female presents one straight, dark proboscis. Males tend to run a little smaller overall. In real life you almost never need to check: if a mosquito is on your arm taking a meal, it is a female, full stop.
Lifespan: Why Females Stick Around Longer
Male mosquitoes are built for a sprint. They emerge, join a dusk mating swarm within a few days, mate, and typically die within one to two weeks. Females are built for the long game. A female commonly lives two to eight weeks in summer, biting and laying eggs in repeated cycles the whole time. Some species stretch it much further: female Culex mosquitoes (the main West Nile carriers in Ontario) can overwinter as adults, hibernating in garages, sheds, and basements and re-emerging in spring. That longevity is exactly why a single female can be responsible for hundreds of offspring across a season.
Do the Two Common GTA Mosquitoes Differ?
The male-versus-female rule holds across every species — but the biting females behave differently depending on the genus:
- Aedes females are aggressive daytime biters that favour the ankles and go after you in the shade. They lay eggs in small containers — buckets, plant saucers, clogged eavestroughs, tarps — that hold even a capful of water.
- Culex females bite mostly at dusk and after dark, are the primary West Nile vector in Ontario, and breed in stagnant, organic-rich water like catch basins, ditches, and neglected ponds.
In both cases the males are the harmless nectar feeders forming the dusk swarms, and the females are the ones you need to control.
Why Male vs Female Matters for Control
Once you know only females bite and only females lay eggs, a smart yard strategy falls out naturally:
- Kill the standing water. Both sexes hatch from the same water, so dumping buckets, saucers, tarps, and clogged gutters every few days stops the next generation of females before it ever flies.
- Treat the shade. Adult females rest on cool, shaded leaves and fence lines during the day. A professional barrier spray coats those resting spots so biting females die on contact for weeks.
- Protect your skin during female biting hours. Use an approved repellent — DEET, picaridin (icaridin), or oil of lemon eucalyptus — around dawn and dusk when females are most active.
- Ignore the males. The swarms over your driveway at sunset are mostly harmless mating males. You do not need to target them; controlling water and resting females handles the whole population.
Health Canada registers the repellent actives and residual products used for this kind of control, so choosing a licensed applicator and a registered repellent keeps it both effective and safe. See Health Canada’s pesticides and pest management guidance for how products are evaluated.