Small holes

Small holes

Observation - Small holes - UK and Ireland. Description: I noticed a few small holes like this one around a tree. There were also a few between bushes on a p

I noticed a few small holes like this one around a tree. There were also a few between bushes on a path. They looked to be a few of inches at best. Seemed like even a mouse might struggle to fit inside. I've heard of hornets making holes, but I have my doubts on if it's that.