This study was conducted on the marsh of Paldang dam and Gyungan-cheon, Gyeonggi-do province. 6
species bred on the emergent plants and the nests of Common Coots Fulica atra, Common Moorhens Gallinula
chloropus, Great Reed-Warblers Acrocephalus orientalis, Yellow Bitterns Ixobrychus eurhythmus, Little Grebes
Podiceps ruficollis and Great Crested Grebes Podiceps cristatus were found. The main vegetations of the nests were
Narrow Leaf Cattails Typha angustata, Reeds Phragmites communis, and Wild Rices Zizania latitolia. Particularly,
Narrow Leaf Cattails were the most favorite plants for breeding birds. Few nests were found on the emergent plants
covered with rubbish, or on high density. And no nests found on the inside shrubs. The mean density of nests on
the marsh was 3.1 nests per ha and the nests were highest in Non-island as 17 nests per ha. The nest density on
the area of Sonae-islands was higher than the area of Kyangdong-kyo bridge. This would be related on the bulk of
narrow-leaf cattails and the quality of water.