Making those first footprints
http://mobugs.blogspot.com, you are missing out on a great site to learn about insects and a assortment of other critters.i send tons of stuff to her and always learn more from her expertise. Here is what she told me about this bagworm.
That is a bagworm. They can be deadly to young trees if they occur in large enough numbers. They are also unsightly in high numbers. I have them all over my eastern cedars, I usually try to pick as many of them off the trees as I can in March or April before the little eggs inside hatch the little worms begin feeding. They are cool in one way though, as newly hatched caterpillars they will already begin looking for substances to attach to their back to form their protective little cocoons. They keep adding to the cocoon as they grow and they live completely inside of it. When they get bigger you can see them emerge part way and feed.
Oops, I was told not to shoot in this room.