Bird song is socially learned. During song learning, the bird's hearing its own vocalization is important for normal development of song. Whether bird's own song is represented and recognized as a special category in adult birds, however, is unclear. If birds respond differently to their own songs when these are played back to them, this would be evidence for auditory self-recognition. To test this possibility, we presented song sparrow males (Melospiza melodia) playbacks of their own songs or stranger songs and measured aggressive responses as well as type matching. We find no evidence of behavioral discrimination of bird's own song relative to the (non-matching) stranger song. These findings cast doubt on an earlier proposal that song sparrows display auditory self-recognition and support the common assumption in playback experiments that bird's own song is perceived as stranger song.

中文翻译：

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宋麻雀不区分自己的歌和陌生人的歌

鸟鸣是社会学来的。在歌曲学习期间，鸟类听到自己的声音对于歌曲的正常发展很重要。然而，鸟类自己的歌声是否在成年鸟类中被代表和识别为一个特殊类别，尚不清楚。如果鸟类在播放它们自己的歌曲时对它们的反应不同，这将是听觉自我识别的证据。为了测试这种可能性，我们展示了他们自己的歌曲或陌生歌曲的歌曲麻雀雄性 (Melospiza melodia) 回放，并测量了攻击性反应以及类型匹配。我们没有发现鸟类自己的歌曲相对于（不匹配的）陌生人歌曲的行为歧视的证据。