Where do mosquitoes go in the winter?

Question

I live in Queens, NYC and we have a h**l lot of mosquitoes during July and August. Where are the mosquitoes coming from? Do they die out completely in the winter? Where does the first mosquito come from?

My theory is that there are places down south that have mosquitoes year round. These travel up north as the spring time and warm weather comes.

Is that it? Confirmation!

Answer 1

Not Quite...

When it gets cold, a biochemical process replaces some of the water in the      mosquito's body with glycerol, which acts like an antifreeze. The glycerol does two      things. First, it reduces ice formation within the mosquito's cells, so that water      hardens like glass but doesn't form ice crystals that can then damage the cells. This      allows tissues to freeze and thaw without appreciable damage. Second, the glycerol      promotes supercooling, which lowers the temperatures at which fluids freeze within      the insect's body by several degrees. This enables the insect to survive at      temperatures below the freezing point of water. This way, unless the winter is      unusually harsh, many mosquitoes make it to spring. Then, when it gets warm, they      come out of hiding and look for a place to lay their eggs.