The group of so-called flooding mosquitoes predominantly lays their eggs in dried-up flooding areas where the clutch can then wait for water for long periods of time. When the water recedes after a flooding event, this is immediately followed by exponential growth of these mosquitoes on a large scale. As adult flying gnats, they only have a relatively short lifespan. However, in this phase, the females need blood to allow maturation of new eggs. For this reason, they are exceptionally active and irritating. They prey on amphibians, game animals, and, given the opportunity, also on humans. On their own, these gnats do not migrate far from their breeding place. However, they can be blown across vast distances by strong winds and thus reach human settlements where, for a short time, they become a major nuisance not only during twilight but even during the day. Of the flooding mosquitoes, only the strongest eggs overwinter. Flooding mosquitoes hardly ever enter buildings. The most important types are Aedes vexans, Aedes (Ochlerotatus) sticticus, Aedes rossicus, etc.