Last May I purchased an older home that had been quite neglected. at that time I noticed many small holes in the dirt about as big around as a pensil. Not Ants, Grubbs or Bees. Just removed 3 pine trees and a 75 year old maple tree and this morning the holes reappeared in the thousands. I never see any bugs crawling or flying just quite a few large brown spiders and webbs around the fences an garage. Are thease bugs just comming out at night? Could they have something to do with the lack of sun and gardening of any kind in the past 30 years?