regular house mouse. I know they're not that hard to catch. I caught 6 in 2 days, and then 1 like 4 days later, then no more. But I wanted to be damn sure I got them all. I'm going to keep a few traps set always in the basement and behind the trash can in the kitchen and stuff forever. I hated knowing there were mice in my house so much. I hated it sys. I had to overreact.