People who live in more or less isolated, small societies and obtain their food by foraging wild plants and hunting wild animals. Foragers generally have a passive dependence on what the environment contains. They do not plant crops and the only domesticated animals that they usually have are dogs. Most foraging societies do not establish permanent settlements. Rather, they have relatively temporary encampments with tents or other easily constructed dwellings. The length of time that they stay in any one location is largely determined by the availability of resources. Foragers are also referred to as hunters and gatherers.