In August, the adult mosquito species that was most frequently collected in traps was Culex pipiens, averaging 9.742 per trap. This mosquito is present year-round, but peaks in abundance during late summer, as the warmer temperatures speed up its life cycle. Culex pipiens numbers are near average for this time of year. Culex erythrothorax, a mosquito that breeds among tules (cattails) in ponds and…

The District conducts intensive surveillance for invasive Aedes mosquitoes during the summer months. The surveillance program mainly targets two container-breeding species, Aedes aegypti and Aedes albopictus, which have been increasing their range within California over the last several years. The presence of these mosquitoes is highly undesirable because they are aggressive human biters and also…