In the course of its daily activities, an animal travels through familiar places to obtain food, seek shelter, or find mates. The actual physical area covered in the course of these regular movements is the animal's home range. An animal's familiarity with the features of its home range allows it to forage efficiently and escape predators when necessary. For example, a house cat in its home range may begin to stalk as it approaches a familiar birdfeeder even if it cannot tell whether there are birds on the feeder. The cat has learned that the birdfeeder is a reliable source of prey and behaves accordingly. An individual animal, a mated pair, a family, or a group of families may occupy a given home range, and home ranges of several individuals or groups may overlap. Animals do not defend the boundaries of their home ranges against intruders...