The highest-ranking rooster has priority to announce the break of dawn

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Tsuyoshi Shimmura; Shosei Ohashi; Takashi Yoshimura;

The “cock-a-doodle-doo” crowing of roosters, which symbolizes the break of dawn in many cultures, is controlled by the circadian clock. When one rooster announces the break of dawn, others in the vicinity immediately follow. Chickens are highly social animals, and they ... View more
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