Most people assume mosquitoes live to bite. The truth is a bit more complicated, and knowing it actually helps you understand why professional control works better than waving them away at dusk. Blood is only part of the diet, and the mosquito that bit you is definitely female.
Quick answer
Most mosquitoes feed on plant nectar and sugary plant fluids for energy. Only female mosquitoes drink blood, and they only do it to get the protein needed to develop eggs. Male mosquitoes never bite at all. Understanding this changes how you think about control: targeting just the biters misses half the picture.
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The Everyday Diet: Plant Nectar
Both male and female mosquitoes drink nectar and other sugary fluids from plants. That is their basic fuel source. They use it the same way you use carbohydrates: for energy to fly, rest, and mate. You can think of it as their version of everyday eating.
This means your landscaping is not just a hiding place for mosquitoes. The flowers, shrubs, and trees on your property are also a food source. Dense vegetation serves double duty as shelter and snack bar, which is part of why a thorough yard treatment targets foliage specifically.
Why Only Females Bite
Female mosquitoes need a blood meal to complete their reproductive cycle. Blood contains proteins and amino acids that fuel egg development. Without it, the female cannot produce viable eggs. So every bite you receive is a mosquito that is gearing up to lay more mosquitoes.
A single female can lay anywhere from 100 to 300 eggs per batch, and she can take multiple blood meals over her lifespan. That math adds up fast in a San Antonio summer when temperatures stay warm enough for eggs to hatch in as little as a week.
Male mosquitoes, by contrast, have no need for blood at all. They survive entirely on plant nectar and live just long enough to mate. If you are getting bitten, the culprits are always female.
What This Means for Your Yard
Understanding mosquito biology points directly to what makes control work. Killing the adults you see addresses the biting problem in the short term. But the feeding and breeding cycle is what keeps the population going.
A professional barrier treatment kills adult mosquitoes in their resting spots, interrupting their ability to feed, mate, and lay eggs. Larvicide treatment in standing water stops the next wave before it ever hatches. Reducing the standing water on your property removes the sites where female mosquitoes deposit eggs after a blood meal.
Together those steps break the cycle rather than just swatting at the symptom.
Host Preferences: Why Some People Get Bitten More
Female mosquitoes find hosts through a combination of carbon dioxide, body heat, and skin odors. Research has shown they are drawn to certain blood types and to people who produce higher amounts of certain chemicals on their skin, though the science on individual attractiveness is still developing.
What is well established: darker clothing absorbs more heat and makes you more detectable, and mosquitoes are most active at dawn and dusk when temperatures drop. If you feel like you get targeted more than others at a backyard party, your biology may genuinely be a factor, not just bad luck.
A Note on the Species in San Antonio
South Texas hosts several mosquito species, with the Asian tiger mosquito (Aedes albopictus) and the Culex genus being the most common around homes. Tiger mosquitoes are day-biters, which surprises people used to mosquitoes being a dusk problem. They are aggressive, persistent, and capable of breeding in tiny amounts of water, like the puddle in a bottle cap.
Knowing which species you are dealing with matters because their habits and peak biting hours differ. A professional can identify what is active on your property and target the treatment accordingly.