Distribution of the brown dipper <i>Cinclus pallasii</i> during breeding season in Hokkaido, Japan

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  • 北海道におけるカワガラスの繁殖期の分布
  • ホッカイドウ ニ オケル カワガラス ノ ハンショクキ ノ ブンプ

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Abstract

<p>The brown dipper Cinclus pallasii was censused along 1,137 transects (2km in length) situated in 1,008 quadrates (4.5×5km), in Hokkaido from late April to late July, 1976-2017. To describe distribution map, distribution data of brown dippers were obtained additionally from spot census results and literatures. For a total of 1,608 quadrates, distribution data were obtained. Brown dippers were distributed in mountainous areas, occurring in 19.0% of 1,608 quadrates. They occurred mainly in forests with running water from 20m to 1,100m in altitudes and occurrence rates (No. of transects of occurrence/No. of transects censused) was 49.5%.</p>

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