Where do mosquitoes go in the winter?

Do mosquitoes migrate when the weather begins to cool?  Do they die?  Where do mosquitoes go in the winter? The life cycle of a mosquito depends on the species, sex, and even the environment.  For instance, male mosquitoes tend to have a shorter lifespan than females.  Male mosquitoes usually mate once and die.  Their lifespan is an average of one week.  The female mosquito usually lives through three breeding cycles.  They can lay eggs about every third day of their life.  Depending on their mating schedule, female mosquitoes can live a couple of weeks or even a month.  One study found that the West Nile mosquito species, Culex, survived longer in mild summer temperatures.  Extreme temperatures saw shorter lifespans for both male and female Culex mosquitoes.  What about wintertime temperatures?