Figure 17. Cocoon of polyphemus moth, Antheraea polyphemus (Cramer) with 2.0 mm diameter hole in top. The cocoon contained a hollow pupal exoskeleton with a hole of identical size, shape, and location as that in the cocoon. The hole is like those reported by Waldbauer et al. (1970) that were caused by hairy and downy woodpeckers.
Credit: Donald W. Hall, University of Florida