The larger the distance, the more it actually works as a navigational source so you won't see those insects since they are navigating just fine. The insects yo

The larger the distance, the more it actually works as a navigational source so you won't see those insects since they are navigating just fine. The insects you see are the ones that happen to get too close and thus their nav gets 'jammed'. It's similar to planes navigating by compass. Works great, until you go up to the arctic circle, then you better have another nav source or you too will be flying in circles.