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Richard P. Reading,John Azua,Travis Garrett,David Kenny,이한수,백운기,Nanette Reece,Purevsuren Tsolmonjav,Mary Jo Willis,Ganchimeg Wingard 국립중앙과학관 2020 Journal of Asia-Pacific Biodiversity Vol.13 No.2
We report on differential movement of adult and juvenile cinereous vultures (Aegypius monachus) in thenortheast Asia. Adult vultures remain in Mongolia throughout the year, whereas many juvenile vulturesmigrate from their breeding grounds in Mongolia to wintering grounds in the Republic of Korea (SouthKorea).We trapped adult and juvenile Cinereous Vultures in Mongolia and Korea to attach wing tags (n ¼270 fledglings and 10 adults) and, for some, global positioning system telemetry units (n ¼ 31 fledglings,18 juveniles, and 10 adults). While adult birds never left Mongolia, fledglings and juveniles wanderedmore widely into Russia (rarely), China, and the Korean Peninsula. Most telemetered fledglings andjuveniles for which we obtained data migrated seasonally between Mongolia and South Korea. Juvenilevultures used larger summer home ranges than adults. Juveniles used much smaller winter than summerhome ranges. Over the course of the year, adult and juvenile vultures moved similar amounts thatdiffered seasonally. How juvenile vultures learn the migration route between Mongolia and Republic ofKorea remains unknown. Our results have important conservation implications, as factors influencing thesurvivorship of migratory birds can strongly impact populations.