The answer is slime mould.
You might think that slime moulds, also known as members of the group Mycetozoa, are fungi. In fact, they did use to be classified as such but it is now recognised that fungi and slime mould are unrelated.
Autumn is a good time to see slime mould. And, of course, you can see them at Dove Stone. One of the really interesting things about slime moulds is, in the life cycle stage known as…