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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: J Comp Physiol A Neuroethol Sens Neural Behav Physiol. 2012 Oct 20;199(1):57–69. doi: 10.1007/s00359-012-0768-4

Figure 3.

Figure 3

a: The song from a male zebra finch is accompanied by an increase of the oropharyngeal-esophageal cavity (OEC; measured distances color coded as indicated in Fig. 1). The song consists of seven syllables (7 through 13) and is preceded by introductory notes (1 through 6). b: calls (1 call from each of six male zebra finches) are also accompanied by coordinated movements of the larynx and hyoid cornua that increase the volume of the OEC. The horizontal lines indicate the duration of the vocalization.