The extent of a taxon, excluding any segment that arises from an introduction to a region or its adjacent areas (IUCN 2012). The natural range of a species refers to the geographical area where that species naturally lives. It encompasses the habitat where all individuals of the species can be found during their lifetime. This range excludes any changes resulting from human activities. For instance, polar bears travel on sea ice, so their range is determined by the extent of sea ice formed in winter1. Some species have wide ranges, like the blue whale, found in every ocean, while others, like the Iriomote cat, inhabit only specific areas, such as Japan’s Iriomote Island. [www.oxfordreference.com] --- Taksonin laajuus, pois lukien segmentit, jotka johtuvat johdannosta alueelle tai sen lähialueille (IUCN 2012).