Immature mosquitoes live and develop in standing water. The location depends upon the species. Some mosquitoes breed in salt marshes, swamps, crab holes, ponds, swales, bromeliads, and even small containers like buckets. But keep in mind, a mosquito only needs a bottle-cap of water to lay up to 300 eggs at one time! As adults, mosquitoes prefer shady places around vegetation. Chances are if mosquitoes are bothering you at home, they are likely breeding someplace nearby.