Skip to main content


Aedes squamiger (California Salt Marsh Mosquito)

Adults emerge in March and remain active through June. Breeds in coastal salt marshes but may fly up to 20 miles. Bites aggressively during the day. May become a major pest to humans.

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)

Active fall through spring. Larvae are found in sunlit water with some shade. Rarely feeds on humans. Not usually a major vector or pest.

Culiseta particeps

Present year-round. Breeds at edges of natural water sources. Prefers large animals but will feed on humans in shaded areas. Not usually a major pest or vector.

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.

Anopheles punctipennis (Woodland Malaria Mosquito)

Adults are active in spring and summer. Breeds in grassy pools along creeks and permanent rivers. Mostly feeds on animals other than humans, but is capable of transmitting malaria.

Anopheles franciscanus

Active in spring and summer. Larvae are found in shallow, sunlit pools at the edge of streams. Rarely bites humans, but is capable of transmitting malaria.

Anopheles occidentalis

Active in spring and summer. Larvae live in small pools and moving streams, ponds, and lakes. Rarely bites humans, but is capable of transmitting malaria.

Join our mailing list