The horsefly trap can be used everywhere where horseflies are a plague paddocks riding stables riding schools golf courses garden water installationsparks amusement parks along lake and river shorelines how it works the dark ball in the centre of the trap symbolises the rump of a horse horseflies can only perceive bright and dark contrasts similar to an infrared camera to increase its attractiveness the protective screen is in the contrasting colour white as a demarcati