When you look closer, you see the soil has a tube-like appearance. This is because it has passed through their bodies. They do not often become a problem, but some people believe they can become so numerous that they cause turf to become thin in areas. There is no chemical to control them, so water these ares thoroughly to settle the soil. As it gets drier and cooler, worms go deeper in the soil and become less of a concern.
Mushrooms can become quite numerous.
They come in many shapes and colors and some even smell. They can become unsightly but there is no control for them. Remove them or the mulch or whatever they are decaying. Try to improve growing conditions in the area by aerating, drying or wetting the soil as needed. Lady bugs are interesting.