This study was conducted to understand the regional distribution characteristics of swans(Cygnus spp.) in downstream of t he Nakdong River , R.O.Korea from October 2008 to September 2013. During this period, a total of two species and 37,518 ind ividuals of Swans(Cygnus spp.) were observed, including 31,596 Whooper Swans(Cygnus cygnus) and 5,922 Tundra Swans (Cygnus columbianus), respectively. The average number of individuals observed in fifteen different areas was 2255.33 in Daemadeung(A), 143.50 in Jangja·Sinjado(B), 304.00 in Sajado·Doyodeung(C), 1928.00 in Lower Ulsukdo(D), 1392.67 in Ul sukdo(E), 50.17 in Ilwoongdo(F), 91.17 in Yeommak(G), 5.17 in Maekdogang(H), 0.00 in Pyeonggangcheon(I), 0.00 in Lowe r Noksan sluice(J), 2.83 in Upper Noksan sluice(K), 6.17 in Jomangang·Doonchido(L), 4.50 in Chideung(M), 0.83 in Joongs ado(N)and 66.17 in Daejeo sluice(O). The total average of these fifteen areas was 480.81. There was a significant differenc e among the survey areas (Kruskal-Wallis test,  =4055.68, P<0.001). In particular, the observed numbers were larger in Daemadeung, Lower Ulsukdo and Ulsukdo than in the other regions.

1. 서 론
2. 재료 및 방법
    2.1. 고니류의 개체수 조사
3. 결 과
    3.1. 전체현황
    3.2. 고니류의 개체수 현황
    3.3. 지역별 고니류의 분포 현황
    3.4. 지역별 월별 고니류(Cygnus spp.)의 분포 현황
4. 고 찰
5. 결 론

• 홍순복(야생동물연합) | Soon-Bok Hong (WildLife Union, Donghae 25802, Korea) Corresponding author
• 홍지표(신라대학교 생명과학과) | Ji-Pyo Hong (Department of Life Sciences, Silla University, Busan 46958, Korea)