Aedes aegypti and Aedes albopictus Mosquitoes
Two invasive (non-native) mosquito species have recently been found in several California cities and there is potential for them to spread into other areas of California. They are named Aedes aegypti (the yellow fever mosquito) and Aedes albopictus (the Asian tiger mosquito). They are relatively easy to tell apart from native mosquito species because of their color and their biting habits. Unlike most native mosquito species, Aedes aegypti and Aedes albopictus bite during the day. Both species are small black mosquitoes with white stripes on their back and on their legs.
In other parts of the world, these mosquitoes are responsible for transmitting viruses that cause dengue to hundreds of thousands of people. They may also transmit other viruses to people including chikungunya and yellow fever. Fortunately, none of these viruses are currently known to be transmitted within California.