English | Arabic |
animal migration Movements that particular animals carry out regularly often between breeding places and winter feeding grounds | الهجرة الحيوانية |
human migration The permanent or semipermanent change of a person's place of residence | الهجرة البشرية |
internal migration A population shift occurring within national or territorial boundaries, often characterized by persons seeking labor opportunities in more advantageous areas | الهجرة الداخلية |
pollutant migration Uncontrolled movement, caused by percolation or other processes, of liquid or gaseous polluting materials from an original source area into other parts of an ecosystem | هجرة الملوثات |
seasonal migration The periodic movement of a population from one region or climate to another in accordance with the yearly cycle of weather and temperature changes | الهجرة الموسمية |