Migration of Tundra Swans (Cygnus columbianus) Wintering in Japan Using Satellite Tracking: Identification of the Eastern Palearctic Flyway Chen, Wenbo and Doko, Tomoko and Fujita, Go and Hijikata, Naoya and Tokita, Ken-ichi and Uchida, Kiyoshi and Konishi, Kan and Hiraoka, Emiko and Higuchi, Hiroyoshi, Zoological Science, 33, 63-72 (2016), DOI:http://dx.doi.org/10.2108/zs150066