I've noticed this phenomenon for quite a while now, but have never bothered posting about it. From time to time, these yellow balls appear in my sphagnum moss and then seem to disappear after a while. They're pretty firm, but feel like a paste when squeezed between the fingers.
Does anyone have a clue as to what these could be?
Here's a pretty poor picture I took with my phone, but it gives you the general idea: