Las Vegas isn’t just home to casinos and bright lights—it’s also territory for several species of biting flies that can turn your outdoor activities into uncomfortable experiences. While the desert climate might seem inhospitable to these pests, certain species thrive in the area, particularly near water sources, livestock facilities, and urban green spaces.
Understanding which biting flies you’re likely to encounter helps you take appropriate precautions and protect yourself from painful bites and potential disease transmission.
You’ll find these six biting fly species throughout the Las Vegas Valley, each with distinct behaviors, preferred habitats, and peak activity times. From the aggressive horse flies near Lake Mead to the nearly invisible sand flies that emerge at dusk, knowing what you’re dealing with makes all the difference in prevention and treatment.
1. Horse Flies
Horse flies (Tabanus spp.) are among the largest and most aggressive biting flies you’ll encounter in the Las Vegas area. These substantial insects measure between 0.75 to 1.25 inches in length, making them immediately recognizable by their size alone. Their large, iridescent eyes—often displaying brilliant green or gold coloration—are particularly distinctive and help them track movement from considerable distances…