The Status and Breeding Biology of Ospreys in Hokkaido, Japan

The condor

Akiko Shoji¹ 

关键词: cliff;    distribution;    Hokkaido;    Japan;    Osprey;    Pandion haliaetus;    range expansion;   

DOI  :  10.1525/cond.2011.110041

学科分类：动物科学

来源: Central Ornithology Publication Office

【 摘 要 】

Abstract. The status and distribution of the Osprey (Pandion haliaetus) in Japan is poorly known, although it is considered as a near threatened species nationally. We studied the status, distribution and habitat characteristics of Ospreys breeding in Hokkaido, the northern island of Japan, from 2002 to 2003. During this period we located 62 Osprey nests and confirmed breeding in 8 of 14 districts of Hokkaido, indicating a sizable population breeding in Japan. Most Ospreys occurred in the western part of Hokkaido. We also found nests in two northern (16%) and one central (16%) districts, where breeding had not previously been confirmed, possibly representing a range expansion or previous underreporting. More than half of all nest sites (n = 35) were on rocks or cliffs, while elsewhere in the world nests in such situations appear to be scarce. The distribution of nesting Ospreys is concentrated where the frequency of the White-tailed Eagle (Haliaeetus albicilla) is lower, suggesting that the Osprey's range...

【 授权许可】

CC BY