“It is important to repeat the measurements several times so that you can obtain an average. If a hornet returns to the bait after 5 minutes, you have a reliable indication that the nest is 500 meters away. But sometimes there are hornets that are not conscientious and who just play around. If a hornet makes a turn and does not consistently go in the same direction, it is less reliable. Besides, it is always the same that work hard, we have discovered ”, Schoonvaere laughs.