Invasive Aedes  Mosquitoes

Do You Have Any of These Mosquito Sources?

May contain: vase, plant, potted plant, jar, pottery, and outdoors

Aedes (pronounced "aid-dees") mosquitoes are aggressive black-and-white insects that thrive in our cities. They have been called "ankle biters" due to their behavior of biting people near the feet. These are not your common Southern house mosquitoes, which are light brown in color.

Invasive, black-and-white Aedes mosquitoes primarily bite humans. In addition, people provide mosquitoes perfect "homes" or sources in their backyards and patios. All it takes is a bottle cap of water to attract mosquitoes!

What's the big deal about Aedes mosquitoes?

Aedes mosquito

They are efficient at transmitting (spreading) several human arboviruses including chikungunya, dengue, yellow fever, and Zika. In recent U.S. history, Aedes mosquitoes were responsible for Zika outbreaks in Florida, Texas, Hawaii, and Puerto Rico. If you travel (Europe, Asia and South America), please be aware you could be a carrier of these diseases and not know it!

Check travel advisories

How Do I Know They're Infesting My Home?

  1. You or a family member receive mosquito bites during the day, even if it's you're standing outside for a few minutes!
  2. Mosquitoes are biting indoors (office, home, garage, etc.)
  3. You notice black-and-white adult mosquitoes about the size of a pencil eraser head.

How do I keep them out of my home?

Tip 'n Toss! Tip out any stagnant water, and toss out unused containers. All mosquitoes require stagnant water to lay their eggs and grow. Eliminating stagnant water around your home prevents mosquitoes from developing in the first place. This is called “source reduction.” If done weekly, source reduction is much more effective at eliminating mosquitoes than using any pesticides.

More ways to get rid of mosquitoes

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Did You Know...?

Most of the invasive Aedes activity in a community comes from residential backyards. In order to reduce the population and control the nuisance, residents must take responsibility for their own yards and work with their neighbors to do the same.

Talk to your neighbors and make mosquito source reduction a part of your weekly routine. Together we can keep a healthier San Gabriel Valley.

How did invasive Aedes mosquitoes get here?

In 2011 our staff identified a thriving population of Aedes albopictus (one type of Aedes mosquito) in the city of El Monte. The mosquito was able to use stagnant water in flower pots, planters, and watered vegetation surrounding people’s homes. In subsequent years, Aedes aegypti and Aedes notoscriptus were also identified in the Los Angeles area.

Reports started coming in of localized infestations up and down the entire state of California.  The statewide infestation of invasive Aedes is due to multiple introductions from shipments of goods contaminated with eggs, as well people moving with plants and containers contaminated with eggs.

Get interactive: Map of Aedes Mosquitoes Invasion (CA Dept. of Public Health)