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Unformatted text preview: anatomical features 3 The song control systems of parrots, hummingbirds, and oscine songbirds Evolution of Vocal Learning • Current phylogenetic distribution – Multiple origins or single origin of vocal learning? – How complete is our info on which groups are learners? • Brain anatomy – Striking similarities among diverse groups • Adaptation versus evolutionary holdover – Current selection may continue to favor learning – Or presence of learning may simply reflect an evolutionary holdover from a common ancestor...
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- Spring '10
- Evolution, song learning, oscine songbirds, vocal control systems, lifetime reproductive success, vocal learning