Nests are made in dark secluded places out of cloth, chewed paper, or any other soft material available. There are few places mice cannot go. These hairs let a mouse know quickly if a tiny opening is large enough for its body. It can squeeze through openings slightly more than a quarter-inch in diameter, or about the size of a dime. They are also excellent jumpers and climbers.
Mice are able to jump to and from great heights, and can climb any grippable vertical surface.
They are known to climb wood, brick, pipes, cables, rope, girders, and wire mesh. They may also gain access by simply gnawing through a barrier, and they are not averse to swimming. What enables us to control mice is their predictability and their curiosity. Mice will explore their territory daily, and establish routes of travel which they utilize again and again, creating high traffic areas. They will also thoroughly investigate any disturbance, or new item in their territories, including traps.