The vocalizations and syringeal anatomy of the common crow, Corvus brachyrhynchos

dc.contributor.authorChamberlain, Dwight R.en
dc.contributor.departmentWildlife Managementen
dc.date.accessioned2018-03-26T19:54:10Zen
dc.date.available2018-03-26T19:54:10Zen
dc.date.issued1967en
dc.description.abstractA study of the vocalizations and syringeal anatomy of the common crow was conducted between 1964 and 1966. Intensive documentation of the sounds produced by the common crow, related to the appropriate behavioral context in which each sound occurs in the wild, was the primary objective of this research. Wild crows were tested with recordings of captive and wild crow vocalizations to determine the nature of the important calls and signals of this species. Common crows were also tested with "distress calls" of three sympatric species. The objectives of the syringeal research was to 1) determine how sound is produced by the common crow and 2) work out the anatomy and probable function of the syringeal components in this species. Fifteen "primary vocalizations" were documented in the common crow. They were defined as sounds which caused responses among crows. Twelve “other vocalizations” were documented in this species. They were defined as sounds which caused no responses among crows. All of the vocalizations of the common crow were not documented in this study. Careful dissections of 55 common crows collected in the field revealed that four pairs of bronchial rings, five tracheal rings, one pair of external tympaniform membranes, one pair of auxiliary membranes, and six pairs of muscles are the components of sound production in the syrinx. Probable functions of these and other syringeal parts are discussed.en
dc.description.degreeMaster of Scienceen
dc.format.extent182 leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/82658en
dc.language.isoenen
dc.publisherVirginia Polytechnic Instituteen
dc.relation.isformatofOCLC# 07364089en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1967.C38en
dc.subject.lcshCrowsen
dc.titleThe vocalizations and syringeal anatomy of the common crow, Corvus brachyrhynchosen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineWildlife Managementen
thesis.degree.grantorVirginia Polytechnic Instituteen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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