One of the learning objectives of this class project is to observe changes in the forest over the course of a season. I stumbled upon an unexpected case of before-and-after with this log, seen in two images. The image at the left was made on 27 September; the one on the right today. The bright yellow, striped fruiting body, just little blobs on the log in September, is the mushroom Laetiporus sulphureus. It’s an edible polypore known by various common names, including Sulphur Shelf and Chicken of the Woods.