Actual Size:  ⅛” to ⅜”

Characteristics: Gray to black; some having white, green or blue markings. Thin-legged with a sharp mouthpiece.

Legs: 6

Antennae: Yes

Wings: Yes

Habitat: Mosquitoes breed in stagnant, standing water sources such as ponds, rain gutters, storm drains, old tires, children’s wading pools, and birdbaths.


  • Development from egg to adult takes 10-14 days
  • Only female mosquitoes bite, as they need a blood meal to reproduce
  • Mosquitoes are most active at duck and dawn and seek out warm, swampy areas

Mosquitoes in the North Bay and East Bay Area CA

Mosquitoes pose the greatest threat to human health worldwide. A typical mosquito bite is uncomfortable, but not necessary life-threatening. However, certain mosquito species can transmit some of the most dangerous diseases in the world, including malaria, Zika, yellow fever, dengue, and more. According to the World Health Organization (WHO), mosquito bites result in the deaths of more than 1 million people every year, with the majority of these deaths due to malaria. There are about 200 different species of mosquitoes found throughout the United States, with habitats ranging from deserts at or below sea level to mountain meadows with elevations of over 10,000 feet.

Mosquito Habitat

Mosquitoes need a source of standing water to breed and live. They are thus most commonly found around swampy areas, marshes, and lakes. That said, they only need a half-inch of water to lay their eggs in. For this reason, they can easily infest backyards right here in the North Bay and East Bay Area. Around homes, they are found in kiddie pools, metal buckets, flower pots, and any object that collects rainwater or excess water from irrigation systems. Because they can easily take up residence in your very yard, it’s important for homeowners to regularly check their property for spots that may be conducive to mosquito breeding.

Mosquito Behaviors, Threats, & Dangers

Most mosquito species require a blood meal before they can reproduce a batch of eggs. Many people and animals are bitten by mosquitoes with no side effects except the typical itchy welt. Most people infected with mosquito-transmitted viruses show no symptoms or only mild, flu-like symptoms that may not result in a visit to the doctor. However, severe symptoms following infection occur in a small percentage of people. Mosquitoes are also responsible for transmitting heartworm in dogs. In any case, it’s important to always enlist the help of a professional exterminator if you have a mosquito infestation forming.