Landscape Research lists the types of migration as labor, forced, international, internal, voluntary and inter-regional migration. Animals and birds normally migrate due to changes in environmental conditions and the need for reproduction. Human beings may migrate in search for better socioeconomic conditions.
According to Landscape Research, labor migration among people involves either skilled or nonskilled immigrants. Changes in the political climate of a state or region may cause forced migration, which involves asylum seekers and refugees, whereas infrastructural projects and tribal wars may displace people, causing internal migration. The processes of migration are not homogeneous. Illegal migration often leads to negative social economic effects on the immigrants.