Mosquitoes

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Worldwide, there are approximately 3,000 species of mosquitoes and nearly 4 million people die each year from various mosquito-borne diseases.

There are 20 different types of mosquitoes in San Diego County. At least 8 types are known to carry diseases that can be passed to humans.

Prevent Mosquito Breeding, Prevent Mosquitoes!

Protect Against Mosquito Bites

Report Mosquito Activity

Contact the San Diego County Vector Control Program if:

  • You have tried to control for mosquitoes and you are still having problems
  • Mosquitoes are coming from a local lagoon, stream, riverbed or other large water source
To report mosquito activity or breeding, please call (858) 694-2888, email us at vector@sdcounty.ca.gov, or use this online form.

The Mosquito Life Cycle

Life cycle_aedes

A mosquito has four stages of life:

1. Egg: Once laid in water, eggs will hatch in 2 to 3 days.

2. Larva: A mosquito larva looks like a tiny wiggling worm in the water.

3. Pupa: A larva becomes a pupa and the adult mosquito develops inside.

4. Adult: Total development time from egg to adult can be less than 1 week during periods of warm weather. The average mosquito will live for about 2 weeks.

Mosquitoes

  • Do not swarm
  • Females suck blood (males don't, they eat nectar)
  • Native Culex mosquitoes can transmit West Nile virus and bite during dusk and dawn
  • Invasive Aedes aegypti mosquitoes bite during the day and can transmit Zika virus if they bite someone with the virus and then bite someone else
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Mosquito Fish

Mosquito fish are an effective and natural method of controlling mosquitoes. They are small, freshwater fish (1-2 inches long) that eat mosquito larvae.  Mosquito fish are ideal for controlling mosquito larvae in backyard ponds, birdbaths, fountains, animal troughs, unused swimming pools and other standing water sources.

Mosquito fish should never be placed in any natural habitat such as lakes, streams, rivers or creeks. They are greedy eaters, so by placing them into natural waterways, they may impact natural species and disrupt the balance of life.

Mosquito fish may be picked up free of charge at different locations throughout San Diego County. 

Learn more about mosquito fish and their care

For More Information On 
Mosquitoes  Or Other Vectors Contact: 
(858) 694-2888  
vector@sdcounty.ca.gov

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