We too have been inundated with these white flying insects. We do not have any Hackberry trees - actually we have no trees yet as our house is fairly new. How do we get rid of these irritating creatures??? I have never seen these things before and am wondering if they are dangerous to pets and/or people? We have a young grandson we keep on a regular basis and I really don't want him exposed to something that can hurt him. Please advise as to how to get rid of them. Thanking anyone and everyone in advance for your assistance. Ellen Mueller Austin, Texas