There are various species of bird's nest fungi, all different in appearance, but all with much the same way of dispersing their spores. In this photo you can see the old fungi from last year (small black cup-like things), and the new fungi, fuzzy brown. Some have started to open, those with a white 'skin' or membrane across the cup. Inside are small sacs that look like eggs, hence the name. The spores are dispersed when rain hits the sacs, bursting them open.