RSPB 🦉 on X: "Did you know that tennis balls prove to be perfect penthouses for harvest mice? https://t.co/cPy6zTmbpV #Autumnwatch https://t.co/CklTqTGYOp" / X
HARVEST MOUSE using tennis ball (Micromys minutus) as refuge/nest (staged) in reed bed Stock Photo - Alamy
Harvest mice having a ball in their new home - Countryfile.com