X-ray films

Film 4: Lateral x-ray positive cineradiographic movie of breathing in a guinea fowl that is resting on its sternum, posterior portion of trunk in view only. No movement of the tail vertebrae or pygostyle can be observed as the posterior air sac is compressed and expanded, except when the bird vocalizes. During vocalization, the tail vertebrae are elevated during compression of the posterior air sacs.

This film was published as supplementary information with:

Claessens, L.P.A.M. [early online view, 2008]. The skeletal kinematics of lung ventilation in three basal bird taxa (emu, tinamou, and guinea fowl). Journal of Experimental Zoology A.

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