Updated: July 6, 2025

Deer flies are a common nuisance, especially during warm months in wooded and rural areas. Their bites can be painful, itchy, and sometimes lead to allergic reactions or infections. Preventing deer fly bites is essential for enjoying outdoor activities without the discomfort and risks associated with these persistent pests. This article provides quick, effective tips to help you avoid deer fly bites and protect yourself during your time outdoors.

Understanding Deer Flies

Before diving into prevention tips, it’s important to understand what deer flies are and why they bite. Deer flies belong to the family Tabanidae and are closely related to horseflies. They are typically ¼ to ½ inch long, with distinctive brightly colored eyes and patterned wings. Female deer flies require blood meals to develop their eggs, which explains their aggressive biting behavior.

Unlike mosquitoes that tend to bite at night, deer flies are most active during the day, especially in warm, sunny weather near water sources such as streams, lakes, or marshes. Their bites are painful because they use sharp mouthparts to slice the skin and then lap up the blood.

Why You Should Avoid Deer Fly Bites

Deer fly bites are not just annoying; they can cause several health issues:

  • Pain and irritation: The bites are sharp and painful initially and can become itchy and swollen.
  • Allergic reactions: Some people develop allergic reactions that cause excessive swelling or rash.
  • Infections: Scratching bites can introduce bacteria leading to skin infections.
  • Disease transmission: Though rare, deer flies can potentially transmit diseases such as tularemia.

Given these risks, taking proactive steps to prevent bites is crucial for your health and comfort.

Quick Tips for Preventing Deer Fly Bites

1. Wear Protective Clothing

One of the simplest ways to reduce your risk of deer fly bites is by covering exposed skin with appropriate clothing.

  • Long sleeves and pants: Wear lightweight but tightly woven fabrics that offer full coverage.
  • Light-colored clothing: Deer flies are attracted to dark colors. Wearing light-colored clothes like white, beige, or pale green helps reduce attraction.
  • Tightly fitting cuffs: Make sure sleeves and pant legs fit snugly at wrists and ankles to prevent flies from slipping underneath.
  • Hats with brims: A wide-brimmed hat can protect your face and neck from bites.

2. Use Insect Repellents Effectively

Applying insect repellents is a crucial line of defense against deer flies.

  • Choose the right repellent: Products containing DEET, picaridin, or oil of lemon eucalyptus have been shown to be effective against biting flies.
  • Apply properly: Cover all exposed skin liberally with repellent before going outdoors. Reapply according to the product instructions, especially if sweating or after swimming.
  • Treat clothing: Permethrin-based sprays can be applied to clothing for long-lasting protection against biting insects without skin irritation.

3. Avoid Peak Activity Times

Deer flies tend to be most active during mid-morning through late afternoon on warm, sunny days.

  • If possible, schedule outdoor activities in early morning or late evening when these flies are less active.
  • Avoid areas near water bodies during peak times since these habitats attract deer flies.

4. Stay Clear of Breeding Areas

Deer flies lay eggs near water sources such as streams, ponds, marshes, and moist soil.

  • When hiking or camping, try to avoid dense vegetation close to these wet environments.
  • Stick to well-maintained trails away from shady spots where deer flies rest.

5. Use Physical Barriers

In some cases, physical barriers can prevent deer fly bites effectively:

  • Head nets: Wearing a fine mesh insect net over your head and neck is very effective during heavy infestations.
  • Screened shelters: If you’re stationary outdoors such as picnicking or fishing, use screened tents or enclosures.
  • Fans: Placing a fan outdoors creates airflow that makes it harder for deer flies to land on you.

6. Maintain Personal Hygiene

Sweat and body odors attract biting insects including deer flies.

  • Shower regularly during outdoor trips.
  • Use unscented soaps or mild deodorants as strong fragrances can lure more insects.

7. Remove Attractants

Deer flies are drawn not only by movement but also by carbon dioxide and body heat.

  • Avoid using scented lotions or perfumes outdoors.
  • Keep food covered when eating outside since smells may attract flies.

8. Promptly Treat Any Bites

Despite your best efforts, you may still get bitten occasionally. Proper care helps prevent complications:

  • Clean bite areas with soap and water immediately.
  • Apply ice packs to reduce pain and swelling.
  • Use anti-itch creams or antihistamines for relief.
  • Avoid scratching to prevent infection.

Additional Tips for Outdoor Enthusiasts

If you often spend time in areas prone to deer fly activity such as hunters, campers, hikers, or gardeners:

  • Carry extra insect repellent with you.
  • Wear insect-repellent-treated clothing designed specifically for outdoor use.
  • Set up portable fans around your campsite or picnic area.
  • Consider using electronic insect repellents designed for flying insects (note their effectiveness varies).

When Should You Seek Medical Attention?

Most deer fly bites heal without complications. However, seek medical advice if you experience:

  • Severe allergic reactions such as difficulty breathing or swelling beyond the bite site.
  • Signs of infection including redness spreading from the bite area, pus formation, fever, or severe pain.
  • Symptoms of unusual illness after exposure such as fever or muscle aches that might indicate disease.

Conclusion

Preventing deer fly bites requires a combination of smart clothing choices, effective use of repellents, avoiding high-risk areas during peak activity times, and maintaining good hygiene practices. By following these quick tips, you can minimize your chances of painful bites and enjoy your outdoor adventures more comfortably. Remember that preparation is key—deer flies can be persistent but with the right precautions, you can stay protected all season long. Stay safe and bite-free!