“These are dropping out of my red oak tree”, writes Steve about the black and white-striped worm-like organism pictured below. “Do you have any idea what this is, or if it will damage my tree?” The creature in question has a segmented body, with vertical white stripes running down its black body. It has a bulbous black head with an orange stripe behind it, and what appears to be thin, white bristles sticking out from its body. Because of the excellent photo that Steve sent in, we are able to identify this as a Datana contracta moth caterpillar.