Japanese Bush Warbler - BirdForum Opus

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Photo by petitebouquet
Photo taken: Gifu pref Japan

Horornis diphone

Distribution

Japan.
Introduced in the Hawaiian Islands, where its populations are rapidly growing in a variety of habitats.

Taxonomy

Formerly placed in genus Cettia.
Clements recognizes six subspecies:

• H. d. borealis from Manchuria to Korea and southern China; winters to Taiwan
• H. d. viridis on southern Sakhalin and southern Kuril Islands; winters to south-east China
• H. d. cantans on the main Japanese islands south to Cheju-Do Islands
• H. d. riukiuensis on Ryukyu Islands
• H. d. restrictus on Daito Islands
• H. d. diphone on southern Izu Islands, Bonin Islands and Volcano Islands

However, Gill and Donsker treat borealis as Manchurian Bush Warbler and include canturians in this species. The Opus awaits further clarification.

Habitat

Photo by Francksan
A Juvenile, Hokkaido, Japan, October 2007

Behaviour

Vocalisation

Calls: In winter makes a low chirping. Sings seasonally, usually with a distinctively long opening note at the beginning of each loud burst of notes. Gives a harsh "chet" sound while hiding.

References

1. Wikipedia

External Links

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