Less Common Mosquitoes

The image shows a close-up of a mosquito, an insect known for its role in spreading disease.
Coquillettidia perturbans

Coquillettidia perturbans

Adults are active in June and July. Breeds in fresh water with cattails and tules. Feeds on large mammals, including humans, after sunset. Transmits encephalitis viruses.

 

Orthopodomyia signifera

The image shows a close-up view of a mosquito, highlighting its detailed structure and features.
Orthopodomyia signifera

Adult activity peaks August–September. Larvae live in hollowed out tree cavities and man-made containers. Prefers to feed on birds. Not considered a vector or a pest due to its limited distribution in San Mateo County.

 

Southern California Malaria Mosquito (Anopheles hermsi)

The image shows a close-up of a mosquito, highlighting its delicate wings and slender body on a lined background.
Anopheles hermsi

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 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.

 

 

 

 

Sideview of a light brown mosquito
Anopheles franciscanus

 

 

 

 

 

 

 

 

 

 

 

Page last reviewed: April 30, 2026

Join our mailing list