Aug 6, 2014

Ontogeny of aerial righting and wing flapping in juvenile birds

BioRxiv : the Preprint Server for Biology
Dennis EvangelistaRobert Dudley

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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Mentioned in this Paper

Vertical
Down Syndrome
Hatching
Aves
Documented
Alectoris chukar
DPH1
Ontogeny
Nose Diseases
Nose

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