京都府木津川における繁殖中のイソシギ成鳥とヒナの標識記録

Abstract

On 8 June, 2002, one fledgling Common Sandpiper was captured, banded and released on the Kizu River (34°52′N, 135°46′E) in Kyoto Prefecture, Japan. On the same date the following year, a breeding adult Common Sandpiper was captured, banded and released, using a slipknot loop trap. Common Sandpiper breed across the middle and higher latitudes of the Eurasian continent. In Japan, they breed around lakes and marshes, and on river gravels, from the Ryukyu Islands north through Hokkaido. Even though they are resident in the Kinki Region, breeding records to date had been limited to Hyogo and Wakayama Prefectures, and these reports are the first for Kyoto Prefecture. The flood plain of the Kizu River consists of gravel interspersed with small patches of reeds and willows. The breeding sites were all located between 80 to 100 meters from the river, on gravelly soil protected by dense grasses. In addition to Common Sandpiper, Long-billed Ringed Plover, Little Ringed Plover, Snowy Plover and Little Tern also nest along the Kizu River. Currently, these breeding grounds are though to be diminishing. Conservation measures, such as establishment of seasonal sanctuaries and strict regulation of off-road vehicles, are urgently required.