Key Takeaways The main signs of a bat infestation are piles of rice grain-sized droppings and dark urine stains.Ammonia smells, scratching and squeaking at night, or bats around your yard are also ...

Seal foundation gaps. Use sealant or expanding foam to fill in gaps where pipes or wires enter the home. For homes with cement board siding, seal along the edges and bottom. For homes constructed with ...