Some nest are special, because a lot of kind of creatures live in there, for example bees, ant, birds, termites and all kind of other animals that we can not see.
The nest have a lot of forms but the normal are in oval forms like you can see and their function of this is protecting their guests, who building it with soil and saliva or a lot of substances produces by their bodies.
The nature are rounder bu all kind of plants too here some ferns which have a great function and their body are parts of the diet of this animals.
And finally some cows excretion which give to us a big quantity of fertilizer for a lot of plants and of course our magical mushrooms.