This note was finalized on 6th May 2016, using sound recordings available on-line at that moment. When applying Tobias criteria, this would lead to a total vocal score of about 4. Furthermore average frequency of notes is (only) slightly lower-pitched (allow 1). There are thus some clear vocal differences, which can be quantified as follows: glaucicomans has longer song strophes (2-3) which have more notes (1-2) and much more repetitions of themes (1-2). Strophes typically have some 10-15 notes. Song strophe typically is shorter than 2s. Other races: Repetitions of single notes occur, repeated themes of two or more notes however are not really identical. Strophes typically have some 10-20 notes. Most notes have a maximum frequency below 4kHz. Glaucicomans: While not all song strophes are typical, repetition of a theme is almost always present (themes are either a single note, or more often 2-3 notes and occasionally more).
#DIFFERENT STROPHES IS PDF#
2016) but again differences are described only qualitatively as having much longer strophes, with repetitions of complex phrases, and a deeper richer voice.Ī comparison of song (illustrated with multiple sonograms in the pdf version of this note). Voice of glaucicomans was also discussed more recently (Zhang et al. Race glaucocomans has long been considered possibly a distinct species (HBW Alive: Clement 2016), and voice is said to be generally richer, with varied warbling notes, and more sustained.
![different strophes is different strophes is](https://strophecouk.files.wordpress.com/2016/10/story.jpg)
We have made use of sound recordings available on-line from Xeno Canto (XC). (2010), as a support for taxonomic review. We also try to quantify the extent of any vocal differences using the criteria proposed by Tobias et al. In the following we briefly analyze and compare voice of the different races of Blue-throated Blue-flycatcher ( Cyornis rubeculoides).