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Horse and Deer Fly Identification and Control in Utah

Correct identification is an important first step in pest control.


Horse flies are large with large colorful eyes and are brown or black in color. They have biting, sword-like, piercing/sucking mouthparts.

Deer flies are generally smaller than the horse fly. They are yellowish brown to brownish black in color with dark markings on their wings. They also have biting, sword-like, piercing/sucking mouthparts.

Horse and deer flies develop in moist or aquatic areas like moist soil, ponds, lakes and marshes.

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Thorn Pest Services Identify the pest with our Horse and Deer Fly gallery

Where do they lay their eggs
Where do they lay their eggs

Horse and deer flies develop in moist or aquatic areas like moist soil, ponds, lakes and marshes.






Yes, they are attracted to light

Thorn Pest Services Tips for keeping horse and deer flies away

Why Are They Significant
Pest control experts
  • Horse and deer flies can travel up to a mile from breeding sites. They inflict painful bites that can result in visible, bleeding wounds.

  • Transmission of disease is possible, but very rare. Horse and deer flies are rarely significant problem inside structure, but can be a severe outdoor problem in areas near wetlands.

How To Get Rid Of Flies Around Your Home
Pest control experts
  • If large numbers of deer or horse flies are present, look for and manage potential breeding sites.

  • Install properly fitted screens in windows and keep doors and windows closed unless they have the fitted screens.

  • Use insect light traps to catch flies inside.

  • Fly traps can reduce populations outdoors.

Learn more by reading our blog post: Dumpster Maintenance.

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Pests can be difficult to control, but that’s what we are here for. We create a strategic plan to gain control of your problem and make sure we get results.

Thorn's Approach

We take a scientific approach to pest control. We start with an inspection and assessment to help us identify the pest, locate where they are, and create a specific plan for your property. Every home and business is different and requires a unique strategy.

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Proper pest management starts with a detailed inspection and assessment from an expert pest professional before treatment. Thorn Pest Solutions uses a three-step process rooted in science to eliminate pests with long-term results.

Assess Situation

First, we identify the root problem(s) with a site assessment. Pests are almost always an indicator of an environmental condition. This will determine the best actions to provide short and your long-term results against pests.

Execute Action Plan

Next, we develop a plan to fix the problems we discovered. This includes solving current pest issues, eliminating conducive conditions, and monitoring for future pest activity. Good pest management starts with a good plan.

Track Success

Lastly, we implement the solutions we developed including inspection, monitoring, and preventing future pest infestations. Good pest control requires a good offense and not just defense. Prevention is key.

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