Science and Medicine

Bird vocalization

Bird vocalization includes both bird calls and bird songs. In non-technical use, bird songs (often simply birdsong) are the sounds produced by birds that are melodious to the human ear. In ornithology and birding, songs (relatively complex vocalizations) are distinguished by function from calls (relatively simple vocalizations).

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• ▸COVID-19 pandemic in China
• ▸Cambrian Railways 4-4-0 locomotives
• ▸Botswana–United States relations

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