Passing along the pavement outside the Paget Road site of Wolverhampton College a few days ago, it would be easy to mistake this giant puffball for a half-deflated football. Some kind of small creature had not made that mistake, and had a good go at eating it.
A gall from a knopper wasp, one of the various types which are found on oak trees, usually towards autumn. This was on a tree on the steep northern bank of the Barley Field.