Came upon your web site trying to locate some information on a cocoon we have hanging in one of our trees. I am sending this picture showing this odd looking form with the hopes you may have some kind of an answer for us. We are hoping that some sort of nice butterfly will emerge, and not some sort of destructive bug. We are located in North Carolina, where we have an array of strange things. Don’t know if this would help, but it is located in a Maple Tree. Any help you could give us would be appreciated.
Thank you for your assistance.
You have Bagworms, Thyridopteryx ephemeraeformis, an unnattractive moth that forms the cocoon you pictured while still a caterpillar. It drags around this protective housing while feeding, eventually pupating inside. The males are winged and females winglessand legless. The appendageless female never lays her eggs inside the bag after mating. They are pests.