I went up to North Carolina last week to visit my mother and I noticed so many of the trees up there had these webs in them. Mom told me they are silk worm nests and they are all over the place this year. The photo below is of a tree on her street that has more than its share of these nests. Apparently they spin a web around a large group of leaves and as they live inside the web they eat the leaves. You can see the damage in the photo below, they have consumed all the leaves on some of the branches. Although it is sad to see damage being done it is always rather awesome to see nature at work.
