I have a section of my yard that I mulched with leaves from the trees that shade that area (Live Oak & Southern Magnolia). The idea was to make very healthy soil for the trees and shade plants without fertilizers or any other soil amendments, not even compost. Basically create an evironment that would attact all the native critters and see what happens.
Two years later and the topsoil (under the mulch) looks very healthy as opposed to the washed out look the bare ground use to have. And the amount of critters seems very healthy. However, I wonder if I may have too many woodlice https://en.wikipedia.org/wiki/Woodlouse ? I ask this because I periodically go out and pull weeds (small trees) and pickup sticks. This morning I found nearly 100 woodlouse on a dead stick that had fallen from the S. Magnolia. They seemed to be eating something on the stick, but I was impressed by the numbers. They were on top of the leaf litter this morning because of the heavy rain last night. Normally I don't see them in that number unless I brush away the leaves.
I'm just curious to know if there's anyway to know if a population of any one critter is too many and indicative of an imbalance? However, I could also ask the same question about the number of ants in this area -- so many, but they don't really eat woodlice.