Mice can stand up on their hind legs when supported by their tails. They do this to eat, fight or figure out where they are. Mice are excellent jumpers, swimmers, and climbers. They can even climb up rough, vertical surfaces. They can jump 13 inches high and run along wires, cables, and ropes. Mice are fast runners. Moving on all four legs, they hold their tail up straight for balance. But if they are frightened, they will just run straight out.
Mice are nocturnal and most active from dusk until dawn. They do not like bright lights, but will sometimes come out during the day looking for food or if their nest is disturbed. A mouse can slip through 1/4-inch holes and gaps.