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Migration Pattern of the Oriental Honey Buzzard Pernis ptilorhynchus at Hongdo Island in Korea  

Choi, Young-Bok (Deot. of Biology, Chosun Univ.)
Chae, Hee-Young (Migratory Birds Center, National Park Research)
Kim, Sung-Hyun (Deot. of Biology, Chosun Univ.)
Publication Information
Korean Journal of Environment and Ecology / v.23, no.1, 2009 , pp. 50-55 More about this Journal
Abstract
To understand the status of the migrating Oriental Honey Buzzard(Pernis ptilorhynchus) in Korea, we carried out a preliminary study on the number and local movements of the Honey Buzzard from September 2005 to October 2007 at Hongdo Island, Jeonnam Province, Korea. A total of 702 Honey Buzzards in 2005, 404 individuals in 2006, and 659 individuals in 2007 were recorded during the fall migration season, but during the spring migration season only two and eight birds were observed in 2006 and 2007 respectively. The migrating Honey Buzzard showed peak numbers from 20 September to 5 October at the study site. According to observation of arrival time of538 Honey Buzzard in October 2007, a total of 2l6 birds(40.l %) were passing over Hongdo Island between 7:00 AM to 8:00 AM, rising skyward on columns of warm air. This suggests the use of thermal currents and avoidance of nocturnal movement for crossing water. They preferred moderate winds(<5 m/s in speed) from northwest, but the migrating number apparently decreased in case of strong winds (${\geqq}5 m/s$). This suggests that wind speed and direction are important environmental factors for migration of the Oriental Honey Buzzard. At present, it is unclear which breeding population(from north-eastern China or Japan) passes over Hongdo Island. Moreover, it is difficult to prove migration route and to understand migratory behaviors of the Oriental Honey Buzzard in Korea. To prove the breeding sites and routes of the migrants over the study site, we need more detailed and further studies such as satellite tracking researches.
Keywords
MIGRATION ROUTE; WIND SPEED; WIND DIRECTION;
Citations & Related Records
연도 인용수 순위
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