Behaviourally driven gene expression reveals song nuclei in hummingbird brain.

Journal Article

Hummingbirds have developed a wealth of intriguing features, such as backwards flight, ultraviolet vision, extremely high metabolic rates, nocturnal hibernation, high brain-to-body size ratio and a remarkable species-specific diversity of vocalizations. Like humans, they have also developed the rare trait of vocal learning, this being the ability to acquire vocalizations through imitation rather than instinct. Here we show, using behaviourally driven gene expression in freely ranging tropical animals, that the forebrain of hummingbirds contains seven discrete structures that are active during singing, providing the first anatomical and functional demonstration of vocal nuclei in hummingbirds. These structures are strikingly similar to seven forebrain regions that are involved in vocal learning and production in songbirds and parrots--the only other avian orders known to be vocal learners. This similarity is surprising, as songbirds, parrots and hummingbirds are thought to have evolved vocal learning and associated brain structures independently, and it indicates that strong constraints may influence the evolution of forebrain vocal nuclei.

Full Text

Duke Authors

Cited Authors

  • Jarvis, ED; Ribeiro, S; da Silva, ML; Ventura, D; Vielliard, J; Mello, CV

Published Date

  • August 10, 2000

Published In

Volume / Issue

  • 406 / 6796

Start / End Page

  • 628 - 632

PubMed ID

  • 10949303

International Standard Serial Number (ISSN)

  • 0028-0836

Digital Object Identifier (DOI)

  • 10.1038/35020570

Language

  • eng

Conference Location

  • England