Last week I discussed having a pond without mosquitoes but there are plenty of places where mosquitoes can breed.
Anywhere there is standing water, there may be mosquito larva.
Look around your yard. Typical places are your birdbath, dishes under plants, low-lying areas in the yard, old tires or literally anything that holds water.
Clear out the standing water at least every two days. That is the lifespan of the larva. Leave it any longer and they will hatch and be patrolling your yard for a tasty meal.
I use the “tap” method when looking for larva. Just tap on the container or in the water and look for movement. Just dump them out and you’ll have a much nicer and safer yard.