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Ontogeny of aerial righting and wing flapping in juvenile birds

View ORCID ProfileDennis Evangelista, View ORCID ProfileSharlene Cam, View ORCID ProfileTony Huynh, View ORCID ProfileIgor Krivitskiy, View ORCID ProfileRobert Dudley
doi: https://doi.org/10.1101/007708
Dennis Evangelista
1Department of Integrative Biology, University of California, Berkeley, CA 94720, USA
2Department of Biology, University of North Carolina at Chapel Hill, NC 27599, USA
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  • For correspondence: devangel77b@gmail.com
Sharlene Cam
1Department of Integrative Biology, University of California, Berkeley, CA 94720, USA
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Tony Huynh
1Department of Integrative Biology, University of California, Berkeley, CA 94720, USA
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Igor Krivitskiy
1Department of Integrative Biology, University of California, Berkeley, CA 94720, USA
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Robert Dudley
1Department of Integrative Biology, University of California, Berkeley, CA 94720, USA
3Smithsonian Tropical Research Institute, Balboa, Panama
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Abstract

Mechanisms of aerial righting in juvenile Chukar Partridge (Alectoris chukar) were studied from hatching through 14 days-post-hatching (dph). Asymmetric movements of the wings were used from 1–8 dph to effect progressively more successful righting behaviour via body roll. Following 8 dph, wing motions transitioned to bilaterally symmetric flapping that yielded aerial righting via nose-down pitch, along with substantial increases in vertical force production during descent. Ontogenetically, the use of such wing motions to effect aerial righting precedes both symmetric flapping and a previously documented behaviour in chukar (i.e., wing-assisted incline running) hypothesized to be relevant to incipient flight evolution in birds. These findings highlight the importance of asymmetric wing activation and controlled aerial manoeuvres during bird development, and are potentially relevant to understanding the origins of avian flight.

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Posted August 06, 2014.
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Ontogeny of aerial righting and wing flapping in juvenile birds
Dennis Evangelista, Sharlene Cam, Tony Huynh, Igor Krivitskiy, Robert Dudley
bioRxiv 007708; doi: https://doi.org/10.1101/007708
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Ontogeny of aerial righting and wing flapping in juvenile birds
Dennis Evangelista, Sharlene Cam, Tony Huynh, Igor Krivitskiy, Robert Dudley
bioRxiv 007708; doi: https://doi.org/10.1101/007708

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