If you and your spouse walk outside at the same time and come back in with wildly different bite counts, you’re not imagining it — and you’re not unlucky. Mosquitoes are actually quite selective about who they feed on, and science has a lot to say about why. Some of it you can control; most of it you can’t. What you can control is the environment. Professional mosquito control reduces the number of mosquitoes in your yard so dramatically that even the most attractive targets get relief.
Blood Type: The Factor You Were Born With
Research has consistently shown that mosquitoes prefer certain blood types. Type O is the most attractive to the most common species — people with Type O blood get bitten roughly twice as often as Type A. Type B falls somewhere in the middle. About 85% of people secrete chemical signals through their skin that advertise their blood type, and those secretors attract significantly more mosquitoes than non-secretors — regardless of what blood type they actually are.
If you’re a Type O secretor, you’ve essentially been broadcasting a dinner invitation your whole life. There’s nothing you can do about it, which is exactly why reducing the total mosquito population in your yard matters so much more for you than for your Type A neighbor.
Carbon Dioxide: The Primary Homing Signal
Mosquitoes detect carbon dioxide (CO2) from up to 150 feet away, and larger bodies produce more of it. That’s why adults tend to get bitten more than small children, and why pregnant women — whose CO2 output is elevated — attract about 21% more mosquitoes on average. Exercise also temporarily spikes your CO2 output and body heat, making a post-workout backyard session particularly rough in a mosquito-heavy yard.
You obviously can’t stop breathing, but you can reduce the number of mosquitoes within detection range. A yard treated with a professional barrier spray cuts down the population so sharply that far fewer mosquitoes are around to pick up your CO2 signal in the first place.
Body Heat And Sweat
Mosquitoes use heat sensors to zero in once they’re within close range. People who run warmer, sweat more, or have just finished physical activity are easier for mosquitoes to locate and land on. Lactic acid — produced during exercise and excreted through sweat — is also a proven attractant, as are several other compounds in sweat including ammonia and certain fatty acids.
What this means practically: if you’re the person in the family who runs hot, sweats easily, or spends time gardening or working outdoors, you’re at the top of the target list on any given evening.
Skin Bacteria And Body Chemistry
Your skin is home to billions of bacteria, and the specific mix of microbes on your skin affects how attractive you are to mosquitoes. Studies show that people with a higher abundance of certain bacteria — particularly on the feet and ankles, which is why ankles are such a common bite location — produce more of the chemical compounds mosquitoes track. Interestingly, people with a greater variety of bacteria types on their skin tend to be less attractive, while those with a dominant species of bacteria may be more so.
There’s not much you can do to reshape your skin microbiome, but it does explain why DEET and other repellents work — they disrupt the chemical signals your skin is sending, essentially jamming mosquitoes’ ability to lock on to you.
Clothing Color: A Factor You Can Actually Control
Mosquitoes locate hosts visually as well as chemically. Dark colors — black, dark blue, navy, deep red — stand out against the horizon and make you easier for mosquitoes to spot. Light-colored clothing in neutral tones (white, tan, light gray) makes you less visible to them from a distance. It’s a small edge, but on a heavy mosquito evening in a North Texas yard it’s a worthwhile one.
Alcohol Consumption
Studies have confirmed what a lot of backyard grillers have probably noticed: drinking beer or other alcohol increases mosquito attraction. The mechanism isn’t completely understood — it may be related to elevated skin temperature, changes in body odor, or increased ethanol excretion through the skin — but the effect is real. One study found that even a single 12-ounce beer significantly increased the number of mosquitoes landing on subjects compared to a water control group.
If you’re hosting a summer cookout, this is another reason to have your yard treated before guests arrive rather than after. Keeping the mosquito population low enough that a few extra attractors don’t tip the balance is the goal.
Pregnancy
Pregnant women are consistently among the most-bitten groups in mosquito studies, for a combination of reasons: higher CO2 output (due to increased lung capacity), elevated body temperature, and changes in body chemistry that alter scent profiles. In North Texas, where mosquitoes are active for the better part of nine months, this is a meaningful health consideration — not just a comfort issue — given mosquito-borne illness risks.
What You Can’t Outrun — And What You Can
The honest summary: most of the factors that make you attractive to mosquitoes are biological and outside your control. Blood type, genetics, body temperature, skin bacteria — you can’t change any of it. What you can do is use repellent when you’re outdoors, wear lighter colors, and reduce the total number of mosquitoes in your yard so that even as a preferred target, you’re not dealing with a swarm.
That last part is where professional yard treatment makes the most difference. Knocking the mosquito population in your yard down by 80–90% means that even if you’re a top-five mosquito target on a biological level, the sheer number of opportunities for bites drops dramatically. You can read more about what drives mosquito timing and peak activity in our post on how often you should treat for mosquitoes in Texas.
Hamann Lawn Care & Weed Control has been helping Arlington and DFW homeowners reclaim their yards since 2006. Whether you’re a confirmed mosquito magnet or just trying to protect your family through a North Texas summer, we build treatment programs around results — not guesswork.