Mosquitoes don't die during winter, they overwinter in human area's in warm moist Places, mainly washing rooms, bathrooms, cellars and similare. They go into a semi hibernation and don't need to feed that much. If every houseowner knew this and hunted Down the critters during Winter we could erradicate all citymosquitoes, and possibly a good amount of suburban ones. The rest overwinters in the wild, so we can never truly get to them all, but we could try... Good hunting, and tell me how many you manage to find. Involve some friends in it as well and we might get the Whole erradication on the move. I campaign this knowledge every year myself, and people are allways surprised to hear it :D