Movements of Oriental honey-buzzards and the temporal change in the estimated thermal energies of lower altitudes (200-600 m) in the East China Sea, the Korea/Tsushima Strait, and the Korea Peninsula during the 2007-2009 spring(12.3MB, 00:00:58)Shot Date: 2011/09/01 | ||
 | species Oriental honey buzzard Key Words | |
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Animalia >Chordata >Aves >Falconiformes >Accipitridae >Oriental >
Below is the abstract from the article containing this video:
Real-time weather analysis reveals the adaptability of direct sea-crossing by raptors
Noriyuki M. Yamaguchi, Yuzo Arisawa, Yasuo Shimada, Hiroyoshi Higuchi, Journal of Ethology, doi:10.1007/s10164-011-0301-1
Many animals seasonally travel between their breeding and wintering grounds. With their advanced mobility, birds often migrate over thousands of kilometres. Recently, satellite-tracking studies have revealed peculiar migration routes for some avian species at a global scale. However, the adaptability of such migration routes has not been clearly demonstrated. Using satellite-tracking data for 33 individuals, we show that the Japanese population of Oriental honey-buzzards (Pernis ptilorhynchus) directly crosses the 650-km-wide East China Sea during their autumn migration, although they fly a longer route around the sea rather than directly crossing it during their spring migration. By applying aerodynamic theory, we show that the buzzards could cross the sea by soaring and gliding flight. Moreover, using a high-resolution meteorological- prediction analysis, we demonstrate that the migratory tra- jectory of the birds strongly depends on the wind direction at their estimated locations. In the area, northeastern tailwinds blow stably only during autumn. Thermals were abundant ca. 500–1,000 m over the East China Sea in autumn, but that was not the case in spring. We suggest that the autumn- migration route across the East China Sea is likely to have evolved in response to the specific weather conditions over the sea. Animations showing movements of Oriental honey- buzzards and temporal change in weather conditions are available at: http://www.momo-p.com/showdetail-e.php? movieid=momo110822oh01a, http://www.momo-p.com/sh owdetail-e.php?movieid=momo110822oh02a, http://www. momo-p.com/showdetail-e.php?movieid=momo110822oh 04a, http://www.momo-p.com/showdetail-e.php?movieid= momo110822oh05a, http://www.momo-p.com/showdetail-e. php?movieid=momo110822oh06a, and http://www.momo-p. com/showdetail-e.php?movieid=momo110822oh07a.
(Data No.momo110822oh06a)
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