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The grey crowned crane - an example of a crested bird species The crest is a prominent feature exhibited by several bird and other dinosaur species on their heads. The crest is made up of semiplume feathers: a long rachis with barbs on either side. These are plumulaceous feathers, meaning that they are soft and bendable. In birds, these semiplumes are common along the head, neck, and upper back, and may be used for buoyancy and sensing vibrations. Crests on birds are generally used for display purposes. Cockatoos and their smaller cousins, cockatiels, are part of the parrot family Cacatuidae found in Australia, the Bismarck Archipelago and the Philippines, and are probably the most recognizable birds to feature crests. [1] Cockatoos and cockatiels possess crests which may be raised or lowered at will. Their crests are used to communicate with fellow members of their species, or as a form of defense to frighten away other species that approach too closely, making the bird ap

Aymara Aymar aru Pronunciation [ajmaɾ ˈaɾu] Native to Bolivia, Peru and Chile Ethnicity Aymara people Native speakers 1,677,100 (2007-2011) [1] [2] Language family Aymaran Aymara Official status Official language in   Bolivia   Peru [a] Recognised minority language in   Chile Language codes ISO 639-1 ay ISO 639-2 aym ISO 639-3 aym – inclusive code Individual codes: ayr  – Central Aymara ayc  – Southern Aymara Glottolog nucl1667 [3] Geographic Distribution of the Aymara language This article contains IPA phonetic symbols. Without proper rendering support, you may see question marks, boxes, or other symbols instead of Unicode characters. For a guide to IPA symbols, see Help:IPA. Aymara ( IPA:  [ajˈma.ɾa] ( listen ) ; also Aymar aru ) is an Aymaran language spoken by the Aymara people of the Andes. It is one of only a handful of Native American languages with over one million speakers. [4] [5] Aymara, along w