Culex pipiens breeds throughout the summer peaking in mid summer and gradually declining until the first frost. Females feed primarily on birds. Culex restuans The immature stages of Culex restuans are found in a variety of habitats including roadside ditches , polluted pools, and discarded tires and buckets. Like all species of Culex , they lay their eggs in rafts on the surface of the water. In warm temperatures it takes 7-10 days for immature to develop to the adult stage.
Females preferably feed on birds but also, to some extent, on mammals, including man.
Adults are morphologically very similar to Culex pipiens and it can be difficult to distinguish between them. Anopheles quadrimaculatus Anopheles quadrimaculatus overwinters as inseminated females. In the spring, eggs are laid singly on the surface of the water. Larvae are found in small ponds , and puddles which contain considerable emergent vegetation. Large mammals are the preferred hosts, but they will occasionally feed on birds and reptiles.