The biggest moth Iâ€™ve ever seen swooped by my head the other night in my bedroom. It was as big as a bat! After it swooped a couple more times, I saw that not only was it as big as a bat, it was a bat! I retreated to the kitchen to strategize while the bat zipped around, occasionally darting down the hall and into the living room. In the end, I held the screen door open for a minute or two, and the bat left.