Analysis of information sources in references of the Wikipedia article "Tongue" in English language version.
The mouth forms of Polynesia are expressive and contain a great deal of variation, from the snarling lips of Hawaiian sculture to the tight-lipped, pursed mouths of the Easter Island statues. [...] The presence or absence of a tongue is helpful in considering the meaning of the mouth forms. The mouth forms showing protrusion of the tongue occur in the Marginal Islands (New Zealand, Hawaii, and the Marquesas), Central Polynesia (Tahiti and the Cook Islands) and the Australs.
