Updated: July 8, 2025

March flies, also known as horse flies or greenheads in some regions, are a common nuisance during the warmer months of the year. These persistent insects are notorious for their painful bites and their tendency to swarm around humans and animals alike. If you enjoy spending time outdoors, March flies can quickly ruin your experience. Fortunately, there are several effective and quick solutions to eliminate these pests and make your outdoor activities more enjoyable.

In this article, we will explore the nature of March flies, why they are attracted to people, and provide practical, actionable methods for getting rid of them outdoors.

Understanding March Flies

Before diving into the solutions, it’s essential to understand these pests better:

  • Appearance: March flies are typically 10-25 mm in length with dark bodies and large, prominent eyes that can have iridescent colors.
  • Behavior: They are most active during warm, humid days, particularly near water sources.
  • Bites: Female March flies bite to obtain blood, which is necessary for egg development. Their bite is painful and can cause swelling.
  • Breeding: They lay eggs in moist soil or near stagnant water, where larvae develop.

Knowing their habits helps in targeting them effectively.

Quick Outdoor Solutions to Eliminate March Flies

1. Use Fans to Create a Breezy Environment

March flies are weak fliers. Setting up electric fans in outdoor seating areas can significantly reduce their presence. The moving air disrupts their flight patterns and makes it difficult for them to land on you.

How to use:
– Position oscillating or box fans around patios or picnic spots.
– Aim fans to create a continuous breeze over your seating area.
– This method is eco-friendly and safe for children and pets.

2. Apply Insect Repellents Effectively

Insect repellents containing DEET, picaridin, or natural alternatives like lemon eucalyptus oil help deter March flies.

Tips for application:
– Apply repellent generously on exposed skin.
– Reapply every few hours or after sweating/watering activities.
– Consider wearing repellent-treated clothing for added protection.

3. Wear Protective Clothing

Covering up reduces skin exposure and lowers the chance of bites.

Recommended clothing:
– Long-sleeved shirts and long pants made from lightweight fabrics.
– Light-colored clothes since dark colors attract more insects.
– Hats with nets can protect your face and neck.

4. Employ Physical Traps

Specific traps designed for horse flies can be very effective at capturing March flies before they reach you.

Popular trap types:
Sticky traps: Brightly colored boards coated with a sticky substance attract and capture flies.
Electric traps: Use light or heat to lure flies into an electrified grid.
Decoy traps: Simulate the appearance of a host animal to attract females looking for blood meals.

Placing traps strategically around gathering areas reduces fly populations over time.

5. Manage Surrounding Environment

March flies breed in moist areas; reducing breeding sites can drastically cut down their numbers.

Environmental control tips:
– Eliminate standing water from buckets, containers, clogged gutters, or puddles.
– Improve drainage in low spots around your yard.
– Regularly mow grass and trim vegetation where larvae may develop.

6. Use Natural Predators

Encouraging natural predators can keep March fly populations under control:

  • Birds such as swallows feed on flying insects.
  • Dragonflies consume adult flies.

Planting native plants that attract these beneficial species supports a balanced ecosystem that naturally reduces pests.

7. Utilize Essential Oils as Natural Repellents

Certain essential oils have proven effectiveness against biting flies:

  • Citronella
  • Lavender
  • Eucalyptus
  • Peppermint

How to use:
– Mix a few drops with carrier oil (like coconut oil) and apply on skin.
– Use in diffusers or spray bottles mixed with water around seating areas.

These oils offer a pleasant scent while keeping flies at bay without harsh chemicals.

8. Schedule Outdoor Activities Strategically

March flies tend to be most active during peak daylight hours.

Activity planning tips:
– Plan outdoor gatherings early in the morning or later in the evening when fly activity is lower.
– Avoid being near wetlands or slow-moving waterways during peak fly season if possible.

This simple adjustment helps minimize fly interactions naturally.

Additional Tips for Effective Control

  • Avoid scented lotions or perfumes: These can attract flies rather than repel them.
  • Keep food covered: Flies are attracted to food odors; covering food reduces attraction.
  • Maintain personal hygiene: Sweat attracts biting flies; showering regularly helps reduce body odor that lures them.

When to Consider Professional Pest Control

If March fly infestations are severe despite taking preventive measures, it might be time to consult pest control professionals. They can:

  • Identify breeding hotspots with specialized tools
  • Apply targeted insecticides safely
  • Suggest long-term management plans tailored to your property

Professional intervention ensures a comprehensive approach when DIY methods fall short.

Conclusion

March flies pose significant challenges during outdoor activities due to their painful bites and persistent behavior. However, by understanding their habits and employing quick solutions such as using fans, applying repellents, wearing protective clothing, deploying traps, managing the environment, and leveraging natural remedies, you can effectively reduce their impact.

Combining several of these strategies will yield the best results, allowing you to enjoy your time outside without constant annoyance from these pesky insects. Start implementing these solutions today to reclaim your outdoor spaces from March flies!

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