Phylogenetic signal in the vocalizations of vocal learning and vocal non-learning birds.

Philos Trans R Soc Lond B Biol Sci · 2021 · PMC8419570 · PMID 34482730

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nearly significantno p-value reported

However, in the random sample of songbird songs, there was only one significant feature (contrast 2: 500–1000 Hz), and two nearly significant features (spectral centroid, entropy), while no significant effects were found for songbird calls.

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