Mosquitoes around GTA yards

Mosquitoes around Greater Toronto Area homes breed in standing water and rest in shade during the day. A saucer under a pot, a clogged eavestrough or a low spot in the lawn is enough. They do not nest in the house. Biting is worst at dusk, in sheltered gardens and near ravines.

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How to recognize it

Biting insects at dusk, especially in still, shady parts of the yard
Larvae, or “wrigglers,” in any container that has held water for several days
Daytime resting on the underside of leaves, under decks and in tall grass
More activity after rain and through warm, humid stretches of summer

What damage it causes

Bites. They do not chew wood, wiring or stored food
Yards and patios that are hard to use from late afternoon onward
A population that rebuilds within days while standing water remains
Breeding sites that sit a few metres from the door, not only in a distant ditch

Where it lives

Saucers, buckets, tarps, tires and clogged eavestroughs that hold water
Low lawn spots and unused bird baths
Shady beds, under decks and along fence lines, where adults rest
Yards across the GTA, including lots that back onto ravines and creeks

Questions about mosquitoes

Do mosquitoes breed in the grass?

Adults rest in grass and shrubs. They lay eggs on standing water. A dry lawn does not breed them. A pot saucer or a clogged gutter does.

Why are mosquitoes worse beside a ravine?

Shady, damp edges give adults places to rest, and low wet ground holds water after rain. The containers and low spots on the property still matter, because that is where the ones closest to the door are breeding.

Common in these cities

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