Mice are common denizens indoors and outdoors. These rodents are naturally curious and impressively adept creatures that investigate their environment in search of food, comfortable nesting sites and other mice. They frequent nearly all buildings in Cambridge, Boston and elsewhere. They can squeeze through a hole the width of a standard wooden pencil, gnaw through wood and plaster, and they are able to climb and jump like little acrobats. They enter rooms because they can, and often because they detect the odors of food and other mice. Food and candy stored in backpacks, desk drawers, open bowls, and elsewhere are highly attractive to mice. Similarly attractive are food packages (even ones still sealed) and food wastes / residues in trash. Mice will steal food and candy and cache these items in wall voids, within and behind furniture, above ceilings and even within hollow office partition walls. Once mice have located food and places to hide, they have no reason to leave. Mice also readily find each other, and then breed like… well… mice.