Where do mosquitoes lay their eggs?

Mosquitoes lay their eggs on the surface of fresh or stagnant water. The water may be in buckets, barrels, horse troughs, ornamental ponds, Swimming Pools, puddles, creeks, ditches, or marshy areas. Mosquitoes prefer water sheltered from the wind by grass and weeds. Mosquitoes usually lay their eggs at night. A mosquito may lay a raft of eggs every third night during its life span. Mosquitoes lay their eggs one at a time, sticking them together to form a raft of from 200-300 eggs. A raft of eggs looks like a speck of soot floating on the water and is about 1/4 inch long and 1/8 inch wide. Tiny mosquito larvae emerge from the eggs within 24 hours.