Biting Flies: What to Expect & How to Stay Comfortable Outdoors
Biting flies are some of the most aggressive outdoor insects, especially in warm, humid, and rural environments. Understanding where they are found and when they are most active can help reduce exposure.
High-Pressure Outdoor Environments
Biting flies are commonly found near water, livestock areas, and open land where conditions support insect activity.
PESKY® products are designed for use against nuisance insects when used as directed.
Results may vary.
Biting flies are commonly found near water, livestock areas, and open land where conditions support insect activity.
PESKY® products are designed for use against nuisance insects when used as directed.
Results may vary.
Common Types of Biting Flies
- Horse Flies – large, aggressive flies often found near water and open land
- Yellow Flies – common in southeastern coastal areas and wooded environments
- Greenhead Flies – typically found in coastal marshes and beach areas
- Black Flies – also known as biting gnats, found near rivers and streams
- Sand Flies – small biting flies common in coastal and humid regions
Where They Are Most Active
- Near standing or slow-moving water
- Farms, barns, and livestock areas
- Coastal marshes and wetlands
- Forested or shaded environments
Why They Are Difficult to Avoid
- Strong attraction to movement and heat
- Active during daylight hours
- Persistent behavior in high-activity environments
👉 These factors may increase exposure in certain outdoor conditions.
What May Help Reduce Exposure
- Apply products designed to help deter insects to exposed skin and clothing
- Treat surrounding areas where flies gather
- Wear protective or tightly woven clothing when possible
- Use airflow in outdoor setups
👉 Learn more about related insects: No-See-Um Protection Guide
Layer Your Outdoor Approach
🧴 On Skin: Bug Stay Away Spray
🌿 Around You: Area Defense Spray
🌊 After Exposure: Cooling Roll-On
👉 Designed to work together for improved outdoor comfort.
Related Outdoor Guides
No-See-Um Guide
Mosquito Guide
Beach Bug Guide
For use against nuisance insects only. Intended to meet the conditions for exemption under FIFRA 25(b). Results may vary depending on conditions and use.