書誌事項
- タイトル別名
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- Roosting Behavior of the Okinawa Rail.
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説明
Roosting behavior of the Okinawa Rail Rallus okinawae was investigated by driving along the forest roads at night using powerful spotlights to locate the birds. The birds were commonly found to climb trees to roost on branches. This behavior was observed throughout the year, but declined somewhat in winter. Their preferred roosting trees were mainly chinquapin, camphor or pine that were either dead or alive. The height of the roosting trees averaged 10.6m, while the branches were 6.7m. The diameter of roosting tree trunks averaged 29.2cm, while the diameter of the branches averaged 12.7cm. The rails were found on trunks leaning at angles 30° to 80° (average 67.2°), which the birds could climb easily. Similarly, the angle of roosting branches varied from horizontal to 70° (average 27.7°). Data collected during this study suggest that roosting in the tree by Okinawa Rail may be predator avoidance behavior. The rail distributed only the northern part of Okinawa Island, where Itajii Castanopsis siebold forest predominated. Conservation of the rail's diminishing remaining habitat is necessary to preserve the species. Development of techniques for captive breeding the Okinawa Rail are recommended.
収録刊行物
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- 山階鳥類研究所研究報告
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山階鳥類研究所研究報告 25 (1), 40-53, 1993
公益財団法人 山階鳥類研究所
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詳細情報 詳細情報について
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- CRID
- 1390282680015049472
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- NII論文ID
- 130003572768
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- ISSN
- 18833659
- 00440183
- http://id.crossref.org/issn/13485032
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- OpenAIRE
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- 抄録ライセンスフラグ
- 使用不可
