They hatch a couple times a year in FL. Usually late April, early May is the worst. They fly around in pairs mating apparently, hence the cute name. They get really thick at times, so if your driving a vehicle, they get plastered all over the front of it. The worst part is that there is something acidic in their composition so after they get mashed onto your vehicle it will remove the clear coat. They really need to be cleaned off the same day to avoid the risk of ruined paint. If you wash them off the same day, it is pretty easy, and water works best. Leave them on to bake in the sun for a day or two and it can be a real bee-yatch to get them off...plus the paint damage. Lots of vehicles running around FL with paint damage from the little buggers.