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This is a list of languages by total number of speakers. It is difficult to define what constitutes a language as opposed to a dialect . For example, Arabic is sometimes considered a single language centred on Modern Standard Arabic , other authors consider its mutually unintelligible varieties separate languages. [ 1 ]
This is a list of languages by number of native speakers. Current distribution of human language families All such rankings of human languages ranked by their number of native speakers should be used with caution, because it is not possible to devise a coherent set of linguistic criteria for distinguishing languages in a dialect continuum . [ 1 ]
International Bioacoustics Council research on animal language. The Animal Communication Project. More information on animal communication. Excellent compendium of links to the websites of all of the major animal language studies; Listen to Nature Archived 2016-09-22 at the Wayback Machine includes article "The Language of Birds"
Most species in the list are officially designated. Some species hold only an "unofficial" status. Additionally, the list includes animals that were once official but are no longer, as well as animals recognized as national symbols or for other symbolic roles.
More than 99 percent of all species, amounting to over five billion species, [7] that ever lived on Earth are estimated to be extinct. [8] [9] Estimates on the number of Earth's current species range from 10 million to 14 million, [10] of which about 1.2 million have been documented and over 86 percent have not yet been described. [11]
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs .
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This is a list of countries by number of languages according to the 22nd edition of Ethnologue (2019). [ 1 ] Papua New Guinea has the largest number of languages in the world.