Roosting Behavior of the Okinawa Rail
Roosting Behavior of the Okinawa Rail
复制标题
冲绳铁路的栖息行为
DOI：
10.3312/jyio1952.25.40
复制
发表时间：
1993
影响因子：
--
通讯作者：
K. Ozaki
中科院分区：
文献类型：
--
作者：
Tetsujiro Harato;K. Ozaki
通过夜间沿着森林道路行驶，使用强大的聚光灯来定位鸟类，调查了冲绳铁路冲绳鸡的栖息行为。这些鸟通常会爬上树，栖息在树枝上。这种行为全年都可以观察到，但在冬季有所下降。它们最喜欢栖息的树木主要是栗树、樟树或松树，这些树要么是死的，要么是活的。栖息树平均高度10.6m，树枝平均高度6.7m。栖息树干直径平均29.2厘米，树枝直径平均12.7厘米。在树干上发现了倾斜角度为 30° 至 80°（平均 67.2°）的栏杆，鸟类可以轻松攀爬。同样，栖息树枝的角度从水平到70°不等（平均27.7°）。本研究期间收集的数据表明，冲绳铁路在树上栖息可能是躲避捕食者的行为。铁路仅分布于冲绳岛北部，那里以 Itajii Castanopsis siebold 森林为主。为了保护该物种，有必要保护铁路上日益减少的剩余栖息地。建议开发冲绳铁路圈养繁殖技术。
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.