...if the woods seems dull and empty.
Just look at the nearest tree; there is a good chance the bark is encrusted with lichens.
Lichens are tremendously interesting.
Lichens are a composite of fungi and algae. The fungi provide a structure and absorb water while the algae provide the food from photosynthesis. This symbiotic relationship enables lichens to be very successful and grow almost anywhere.
Lichens also paint the rocks... time stains.
Lichens are even in my wood pile.