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  • Title: Evolution and diversity in avian vocal system: an Evo-Devo model from the morphological and behavioral perspectives.
    Author: Matsunaga E, Okanoya K.
    Journal: Dev Growth Differ; 2009 Apr; 51(3):355-67. PubMed ID: 19222524.
    Abstract:
    Birds use various vocalizations to mark their territory and attract mates. Three groups of birds (songbirds, parrots, and hummingbirds) learn their vocalizations through imitation. In the brain of such vocal learners, there is a neural network called the song system specialized for vocal learning and production. In contrast, birds such as chickens and pigeons do not have such a neural network and can only produce innate sounds. Since each avian species shows distinct, genetically inherited vocal learning abilities that are related to its morphology, the avian vocal system is a good model for studying the evolution of functional neural circuits. Nevertheless, studies on avian vocalization from an evolutionary developmental-biological (Evo-Devo) perspective are scant. In the present review, we summarize the results of songbird studies and our recent work that used the Evo-Devo approach to understand the evolution of the avian vocal system.
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