The Comparative Studies on The Characteristics of Chinese Bulbul Songs Between Shensi Island and Hangzhou Area

The comparative studies on the characteristics of Chinese bulbul (Pycnonotus sinensis) songs between Shensi Island and Hangzhou area have been made in this paper with computer analysis techniques.The results shows that there were 15 song types in the bulbuls of Shensi Island (SB) and 6 in the bulbuls of Hangzhou (HB),and their trills were composed of a main sentence,including 3 syllables in SB and 4 in HB,and some other single syllables.Although there were some same characteristics on the composition of the song syllables and the way of calling between SB and HB,there were many different characteristics on the song structure between them.The intermission between syllables,for example,in SBs main sentence was longer than in HBs.The maximum MPF of the SBs main sentence was located in 2nd syllable minimum in 3rd syllable,and the powers and En values of the all syllables were high and no obvious difference.The total time of the SBs main sentence duration was 800.88±37.86 ms.In the HBs main sentence,there were no visible syllable intermissions besides between 1st and 2nd syllables,and the maximum MPF was located in 4th syllable and minimum in 3rd one.The power of all syllables were difference in HBs,and the En was mainly distributed in last syllable.The total lasting time of the HBs main sentence was 1076.65±58.2 ms.From the results,we also could know that the calling song had much more difference on the structure of temporal waves and power spectrum of the single syllable between SB and HB.The differences of the birds song structure between SB and HB might be correlated with their habitats.