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http://dx.doi.org/10.13047/KJEE.2015.29.3.344

Environmental Factors Affecting the Start of the Dawn Chorus of Wild Birds and the Differences between Each Species  

Ki, Kyong-Seok (Dept. of Horticulture and Landscape Architecture, Sangji Univ.)
Hong, Suk-Hwan (Dept. of Landscape Architecture, Pusan National Univ.)
Gim, Ji-Youn (Dept. of Applied Plant Science, Sangji Univ.)
Publication Information
Korean Journal of Environment and Ecology / v.29, no.3, 2015 , pp. 344-352 More about this Journal
Abstract
This study aims to identify the difference in the starting time of the dawn chorus of different species of birds and related environmental conditions. For this study, the bird songs were recorded every 2 hours a day starting from 2 hours before sunrise for a whole spring season (from April to June, 2014) in Korea. The recorded sounds were analyzed to find the starting time of each species' song by sonogram pattern using a sound analyzing program (Adobe Audition CC). To analyze the relationship between the environmental conditions and the time of the birdsong of each species, we collected the data of environmental conditions: daily precipitation, Julian date, time of sunrise and moonrise, temperature data and twilight time from the Korea Meteorological Office. As a result of this study, it was found that there are several statistical correlation between the starting time of the birdsong and environmental conditions (every environmental condition except daily precipitation and time of moonrise). Also, the difference of the starting time among each species were identified. The species were divided into 3 groups (early, mid and late) by their wake-up time. Ring-necked pheasant and yellow-throated bunting were categorized as 'Early' group and all woodpeckers were categorized as'Late' group. This study is significant as it first presented a classification of wild birds in Korea by the starting time of their dawn chorus. However, further studies are required to identify why each species to do their dawn singing at different times.
Keywords
BIRD SONG; DAWN CHORUS; BREEDING SONG; SINGING TIME; SOUND ECOLOGY;
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