2004 Volume 48 Pages 1315-1320
Distribution and wetland utilization of shorebirds were observed at wetland located on the North coast of Tokyo bay in winter 2003. Dunlin and Kentish plover were dominant species appeared during the observation. Number of these shorebirds was three to four times larger during ebb tide period than those during flood tide period. Ebb tide period supplies adequate feeding area for shorebirds, and patchy distribution of shorebirds has strong relation with micro-topography of wetland. This phenomenon is attributed to feeding behavior and strategy of shorebirds. Ebb area and micro-topography are indispensable factors for constructing wetland as a bird sanctuary.
