?Hi all. Recently I had chance to look at the spectrograms of the songs of Chipping sparrow and Dark-eyed junco as they are considered to be difficult to distinguish.
Chipping Sparrow does beautiful variation in its song. The energy level peaks either at higher frequency in every subsequent trill note or decreases. And sometimes it forms a nice pattern of energy peaking in each trill note. Also it is of much longer duration. While junco's trill were shorter almost replicable length for each phrase and the energy level peaked in subsequent trills rather randomly. I need to look more closely if there is any difference. I will have to record more Chipping sparrows to see if it holds true for all chipping sparrows or it was this particular individual who did so much variation. I also had recorded a Song Sparrow on the same day. Out of nine songs I recorded, eight of them were different in some respect or the other in the notes used and the placing of the notes. And there was another Song Sparrow singing some distance away it also seemed to do lot of variation in its song but not as much as the closer one. It is such fun to learn the differences of individuals and I am very excited. I must look at my older Song Sparrow recordings and pay attention to their variation. If anyone else is curious to see the spectrogram send me an email to me at m...@cornell.edu<mailto:m...@cornell.edu> I will mail the spectrogram. Cheers Meena Meena Haribal Ithaca NY 14850 42.429007,-76.47111 http://www.haribal.org/ http://meenaharibal.blogspot.com/ Ithaca area moths: https://plus.google.com/118047473426099383469/posts Dragonfly book sample pages: http://www.haribal.org/dragonflies/samplebook.pdf -- Cayugabirds-L List Info: http://www.NortheastBirding.com/CayugabirdsWELCOME http://www.NortheastBirding.com/CayugabirdsRULES http://www.NortheastBirding.com/CayugabirdsSubscribeConfigurationLeave.htm ARCHIVES: 1) http://firstname.lastname@example.org/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/Cayugabirds 3) http://birdingonthe.net/mailinglists/CAYU.html Please submit your observations to eBird: http://ebird.org/content/ebird/ --