A plague of flies is quite irritating. But what is worse: flies can also cause problems, for example the spread of diseases. Flies also cause stress to the animals. At daytime flies are in buildings, such as barns and sheds, in search of food. At night they leave these rooms again to search for a good sleeping spot. At the transition between day and night, the flies will be attracted by the smell of FlyBuster attractant (100% natural). They will be trapped by the patented ‘one way’ openings from which no escape is possible. For the best results it is recommended that flytraps should be placed outside on one and a half meters from the ground out of the wind.