Autumn Fungi

Although I'm fascinated by the variety of fungi, I find it difficult to identify them even with a field guide. However, I think this is a shaggy ink cap. They are already starting to blacken.

This completely black toadstool was on the path surrounding Gaddon Loch. Really not at all sure what it is.

This one was at the side of the path in the Serpentine Walk in Largo. Maybe a russula species?

This fungus started off as a dome shape and then flattened as in the photo below. I thought it might be a parasol type but not sure.