Scrambled egg fungus (it has other, less appetizing names) is supposedly a fairly common fungus, though I have never noticed it before this summer.
It grows on tree stumps and other dead wood – those shown here are on wood mulch.
Once it appears, its appearance changes rapidly over the course of a day or so. It starts off the pale yellow colour which gets it the “scrambled egg” monicker.
It then fades to a white which soon develops a dirty-looking brown, grey or black surface.