There was a praying mantis egg case (ootheca) attached to the wall of the building next door to where I work. It had been there since late October, when the weather started to become chilly. Recently, they started doing some work on repairing the wall and knocked the egg case off. I managed to find it in the dirt and thought it might need a safer place until the eggs hatched. So I took it home and it is now in a plastic container in my refrigerator. Does anyone know how long it is safe to leave it in my refrigerator? Should I try to find a safe place for it outside, instead?