短報
北海道におけるヤマゲラの繁殖期の分布
2015 年 47 巻 1 号 p. 33-39
詳細
2015 年 47 巻 1 号 p. 33-39
The Grey-headed Woodpecker Picus canus was censused along 1,071 2-km transects situated in 953 5-km quadrats, in Hokkaido from late April to late July 1976–2014. Based on census results and records from the literature, Grey-headed Woodpeckers were recorded almost throughout Hokkaido, except on the plains and on neighboring islands. They occurred in 27% of quadrats in which censuses or observations were conducted, being observed mainly in mixed and deciduous broad-leaved forests, with occurrence rates (No. of transects of occurrence/No. of transects censused) of 22% and 23%, respectively, and at less than 550 m altitude.
