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March flies, also known as horse flies or tabanids, are stout-bodied flies, 6mm to 25mm in length with very large eyes. There are more than 200 species in Australia.

The females of most species of March fly take a blood meal after inflicting a painful bite with their piercing mouthparts. They can be annoyingly persistent when attempting to bite. The adults of both sexes feed on nectar and plant juices.

March flies can be a serious pest to:

  • humans
  • livestock
  • domestic animals
  • wildlife.

March flies breed in places such as:

  • damp soil
  • rotting vegetation
  • sand
  • rot holes in trees.

Their lifecycle from egg to adult can take months or years depending on the species and soil temperature.

Adults generally live for 3 to 4 weeks.

March flies respond to particular environmental conditions, and often breed in large numbers after heavy rainfall during summer months.

Adult March flies are most active in daylight during the warmer months, particularly on calm, sunny days.

In the tropics, they may continue to be active through the drier winter months.

March flies are not known to transmit diseases to humans or livestock in Australia.

Their bite, however, can cause serious allergic reactions in some people which may require hospitalisation.

Livestock can suffer severe blood loss from repeated biting and the wounds can become infected.  Animals can become so stressed by the biting that they won't come out of shelter to graze, causing them to lose condition.

Some species can produce serious symptoms in some people, including:

  • hives
  • fever
  • wheezing
  • in severe cases, anaphylaxis (severe allergic reactions).

The H-Trap is a chemical free way to control march flies. 

It is generally not possible to control march flies using large scale pesticide applications.

This is due to the extensive size of their breeding areas and their ability to travel long distances.

The H-trap is designed to be placed outdoors, where it works without the need for chemicals or electricity.

Extensive independent trials have shown a reduction of 90-95% in horse fly numbers in areas protected by the H-trap can be realized.

The horse flies are ‘tricked’ into mistaking the centrally placed black ball in the H-trap as a large animal, such as your horse. Like the body of the horse, the ball emits heat which attract them to it.

Once they position on the black ball, they will investigate it and try to sting it. Since they will be unsuccessful in gaining their desired blood feed, they will follow their natural behaviour and fly away.

Horse flies naturally fly upwards, into the overhanging hood system, where they are guided into a centrally placed collection bin. This is filled with water and they die in the trap.

How to get the best out of your H-trap:

  • To maximise interception of horseflies before they reach their target prey, identify their likely flight paths from damp areas (ponds, riverbanks, etc) to where humans or animals congregate.  fessional horsefly control system 
  • Decide if more than one H-trap is required*
  • Position your H-trap(s) between these areas, but closer to places where animals congregate eg. stable yards.    Always place the trap in an open area, ideally in direct sun and away from shade. 
  • Place your H-traps early, preferably just before the first adult horseflies emerge in September.  Professional horsefly control system 
  • Check traps weekly, emptying and topping up with soapy water as necessary.
  • If the H-trap is not catching sufficient numbers of flies, and you are sure adult emergence has started, reposition the trap.

*required H-traps in the field
– max. up to 5 horses or
– 10.000 m2 (100 x 100 m)

H-trap-whyheader,  Professional horsefly control system 

  • User Friendly Set-Up
  • Single leg for easy grounds keeping
  • Anti-rotation ground anchor
  • Weather Resistant Design
  • Hot zinc dipped steel frame
  • UV proof green conical hood
  • UV proof collection bin
Note that the H-Trap works exclusively on the tabanid species of flies and does NOT work for blow flies or house flies.

Parts included:
3 part pipe stand including an anti rotation anchor
Collection container
Nuts and bolts
Wrenches for assembly
Manual pump
Assembly instructions

Part is shipped in pieces and needs minor assembly on site.  A hammer or ground drill is needed to drive the base pipe into the ground.

Dimensions1.20 m middle diameter, height above the ground is 1.95 m

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