Aedes squamiger (California Salt Marsh Mosquito)
Aedes dorsalis (Summer Salt Marsh Mosquito)
Adults are active late spring into the fall. Breeds in tidal or reclaimed marshes, but may fly long distances. Aggressively bites during the day. Can be a major pest to humans and a secondary vector for Western Equine Encephalitis.
Aedes washinoi (Fresh Water Mosquito)
Adults emerge late winter to early spring. Breeds in freshwater ground pools and shaded pits near rivers or streams. Does not fly more than 1/2 mile from breeding habitat. Bites humans during the day. Can become a localized pest.
Culiseta inornata (Large Winter Mosquito)
Aedes sierrensis (Western Treehole Mosquito)
Active in spring, but can be found in summer and fall. Breeds in treeholes or small containers. Aggressive biter, both day and night, particularly in shaded areas. Major pest to humans and vector of dog heartworm.
Anopheles hermsi (Southern California Malaria Mosquito)
Adult activity peaks in June and July. Breeds in matted cattails and roots of willows, river margins, streams, and pools. Aggressive biters at sunrise and sunset. Capable of transmitting malaria.