Vaurie, Charles.Schwartz, Paul, ornithologist.2005-10-062005-10-061972http://hdl.handle.net/2246/269113 p. : ill. ; 24 cm.Includes bibliographical references (p. 13)."Synallaxis unirufa and S. castanea of northern South America were considered to be conspecific by all modern authors until very recently, but they differ most distinctly structurally and in their vocalizations and are shown to be separate species. Another pair of birds (azarae and elegantior), which had also been considered conspecific, is separated specifically by a similar combination of morphological and acoustical characters. The study of the vocalizations is introduced by a general analysis of the vocalizations of other species of Synallaxis. This paper supports also the merging of Poecilurus with Synallaxis"--P. [1].2445917 bytesapplication/pdfen-USQL1 .A436 no.2483, 1972Synallaxis unirufa -- Morphology.Synallaxis castanea -- Morphology.SynallaxisBirdsongs -- Venezuela.Birdsongs -- Andes Region.Birdsongs -- South America.Birds -- VenezuelaBirds -- Andes RegionBirds -- South Americatext