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Wild Birds Learn Songs from Experimental Vocal Tutors.

Authors :
Mennill DJ
Doucet SM
Newman AEM
Williams H
Moran IG
Thomas IP
Woodworth BK
Norris DR
Source :
Current biology : CB [Curr Biol] 2018 Oct 22; Vol. 28 (20), pp. 3273-3278.e4. Date of Electronic Publication: 2018 Oct 04.
Publication Year :
2018

Abstract

In eight groups of animals, including humans and songbirds, juveniles are understood to learn vocalizations by listening to adults [1-4]. Experimental studies of laboratory-reared animals support this hypothesis for vocal learning [5-7], yet we lack experimental evidence of vocal learning in wild animals. We developed an innovative playback technology involving automated loudspeakers that broadcast songs with distinctive acoustic signatures. We used this technology to simulate vocal tutors in the wild and conducted year-long tutoring sessions to five cohorts of free-living migratory Savannah Sparrows in eastern Canada. We confirm that wild birds learn songs by listening to adult conspecific animals, and we show that they pass these songs on to subsequent generations. Further, we provide the first experimental evidence in the wild that the timing of exposure to tutor song influences vocal learning: wild Savannah Sparrows preferentially learn songs heard during both their natal summer and at the outset of their first breeding season. This research provides direct experimental evidence of song learning by wild animals and shows that wild birds learn songs during two critical stages of development early in life. VIDEO ABSTRACT.<br /> (Copyright © 2018 Elsevier Ltd. All rights reserved.)

Details

Language :
English
ISSN :
1879-0445
Volume :
28
Issue :
20
Database :
MEDLINE
Journal :
Current biology : CB
Publication Type :
Academic Journal
Accession number :
30293720
Full Text :
https://doi.org/10.1016/j.cub.2018.08.011