I'm kind of new to gardening, having just bought a house. This pest was on my grapevine, decimated it. I sprayed the vine, and now it has moved to my apple tree. It has pretty much ruined it now. Can you id it for me, so I can read up on it. It is really creepy, and there are MANY that appear to be mating while they are eating. The are real slow erratic when flying. Thanks,