A newly-emerged hare’s foot inkcap looks a bit like a hare’s foot. Then the stem extends, the cap flattens then turns somewhat concave before disintegrating to release the spores. Within twenty four hours it’s all over: the mushroom is gone.
These were growing on wood chip mulch by the Avon in Stratford. On the few occasions I’ve ever seen this mushroom (in various locations around Wolverhampton), it’s always been on wood chip mulch. Apparently that’s the best place to look.