Also, don't underestimate their ability to get high. Axel (400 gram male at the time) somehow got up about 3-4 feet behind the washer and into a hole in the wall. Got snuggled into the insulation, and died of the cold. I really wish I could have found him sooner, but I didn't find him until the wall had to be cut open to fix the washer line. By that time it was too late. Exhaust EVERY possible avenue of searching, no matter how unlikely. Always be looking.