개개비사촌(Cisticola juncidis)의 분포와 생태에 관한 연구 = A Study on the Distribution and Ecology of the Fan-Tailed Warbler ( Cisticola juncidis )

국문 초록 (Abstract)

개개비사촌에 대하여 1988년부터 1996년까지 총 53회에 걸쳐 낙동강 하류와 기타 지역에 상당수 서식하는 것으로 확인하였다. 관찰이 되는 시기가 4~10월이고 6~8월이 번식기이므로 여름철새(Summer Visitor)라 할 수 있다. 수컷은 주로 번식기에 공중을 날면서 「삣 삣 삣 …」하는 짧고 청명한 특이한 울음소리를 내므로 쉽게 확인할 수 있다. 서식지는 습지부근의 넓은 초원으로서 주로 띠(Imperata cylindrica var. koenigii)군락이 있는 곳이고, 둥지는 지상 30~50㎝에 만드는데 띠의 줄기와 잎에 구멍을 내어 거미줄로 엮어서 만들며 호리병 모양의 둥지 속에는 띠꽃과 깃털을 깔아 놓는다. 둥지의 크기는 길이가 10.0㎝, 속 깊이가 7.0㎝, 폭이 4.0~6.5㎝이다. 한 배의 알은 보통 5~6개이고, 알의 크기는 장경 15.48±0.34㎜, 단경 11.55±0.16㎜(n=11)이며, 알색은 흰바탕에 적갈색의 작은 점무늬가 산재하며, 모양은 타원형(계란형)이다. 5개체(♂3, ♀2)의 부리는 7.62±0.39㎜이고 부척은 18.12±1.07㎜, 날개는 47.99±1.74㎜, 꼬리는 37.07±3.68㎜이다. 부척, 날개, 꼬리에서 수컷이 조금 큰 것 같으나 전반적으로 암수간에 큰차이는 없는 것 같다.

다국어 초록 (Multilingual Abstract)

A survey were carried out to investigate the distribution and ecology of the Fan-tailed Warbler between 1988 and 1996, and the results were as follows. Considerable numbers of the Fan-tailed Warbler were widely distributed at several areas of Korea, especially in Nakdong estuary. The Fan-tailed Warbler can be classified as a summer visitor because it can be found the habitat between April and October, and the breeding between June and August. Fan-tailed Warbler's male can be easily identified due to the unique, short and clear sound during its flying during the breeding season. Habitats of Fan-tailed Warblers can be usually found in broad grassland near a damp area, particularly in the areas where there are large population of Imperata cylindria var. koenigii. Fan-tailed Warblers built their nests at 30~50 cm above the ground, and they used stalks and leaves of Imperata cylindria var. koenigii and wove like as a cobweb. Inside of the ground-shaped nest, flowers of Imperata cylindria var. koenigii and feathers are laid. The size of nest is generally 10 cm in length, 7.0 cm in depth and 4.0~6.5cm in width. Clutch-size was generally 5~6 eggs, and egg length was 15.48±0.34 ㎜ (n=11) and egg breadth was 11.55±0.16 ㎜ (n=11). Eggs are white with small reddish brown spots. The shape of egg is oval. The size of bill, tarsus, wing and tail were 7.15~8.20 (average 7.62 ㎜), 16.95~20.10(average 18.12 ㎜), 46.90~49.95 (average 47.99 ㎜), and 36.20~43.85 (average 37.07 ㎜) respectively. Generally, there was no difference in the body size of males and females, although males was slightly bigger in the sizes of tarsus, wing and tail than that of females.