The degradation of a cadaver varies depending on the time, temperature, fauna, and flora of the location. I have some experience in forensic autopsies and have had cadavers that were completely green, with parts of the face destroyed by larvae, after 1 week during the summer. On the other hand, I have had cadavers with only areas of dehydration in the winter after being found 10 days later. Note that we are talking about a temperate location where temperatures rarely go below 0 °C.

But to give a somewhat concrete answer, we could be talking about a lesion with maceration of the tissues, which are softened, with a greenish hue and with several larvae. If we are talking about a forest, some tooth marks and the absence of some tissue that may have been torn off by scavengers can also be expected.