Complex sentence: Males are often attracted to bright lights at night and can sometimes be found swarming around them along with other insects, though as ambush hunters, they fly at night primarily for dispersal and not in search of food.
Split into simpler sentences: Males are often attracted to bright lights at night and can sometimes be found swarming around them along with other insects. Ambush hunters, though, they fly at night primarily for dispersal, not in search of food.