Distribution of the brown dipper Cinclus pallasii during breeding season in Hokkaido, Japan

Abstract

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%.