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首页> 外文期刊>The wilson journal of ornithology >Collared Forest-Falcon (Micrastur semitorquatus) Preying on Chestnut-mandibled Toucan (Ramphastos swainsonii) in Costa Rica
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Collared Forest-Falcon (Micrastur semitorquatus) Preying on Chestnut-mandibled Toucan (Ramphastos swainsonii) in Costa Rica

机译：衣领猎鹰（Micrastur semitorquatus）捕食在哥斯达黎加的栗子下颌巨嘴鸟（Ramphastos swainsonii）

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摘要

Predator-prey interactions occur regularly in nature; however, predation events are difficult to observe in the canopy of tropical rain forests. We describe a successful capture of a Chestnut-mandibled Toucan (Ramphastos swainsonii) by a Collared Forest-Falcon (Micrastur semitorquatus) in Carara National Park, Costa Rica. The predator-prey interaction lasted for ～30 min from the moment of the first wounding strike in the canopy to the killing of the toucan on the ground. During the predation process, the falcon engaged in multiple attacks from different directions at the sub-canopy level. We video recorded a total of 323.3 sec tracks during the predation event to produce a detailed description of the behavior of both species. In addition, we analyzed the structure of the call of the toucan while being attacked and compared that with a regular call of another individual recorded at a different time in the same area. The toucan produced a distress call with strong harmonics and a broad-band rattling sound as a threatening call. We comment on the possible function of the calls.
机译：捕食者与猎物之间的相互作用自然而然地发生；然而，在热带雨林林冠中很难观察到捕食事件。我们描述了由衣领猎鹰（Micrastur semitorquatus）在哥斯达黎加卡拉拉国家公园成功捕获的板栗下颌巨嘴鸟（Ramphastos swainsonii）。从机盖第一次受伤袭击到地面上的巨嘴鸟被杀死，掠食者与猎物的互动持续了约30分钟。在捕食过程中，猎鹰在子冠层进行了多次来自不同方向的攻击。我们在掠食事件期间录制了总共323.3秒的轨道视频，以详细描述这两种物种的行为。此外，我们分析了巨嘴鸟在被攻击时的通话结构，并将其与同一地区不同时间记录的另一个人的定期通话进行了比较。巨嘴鸟发出的求救呼叫带有强烈的谐波和宽带的嘎嘎声，这是威胁性呼叫。我们对调用的可能功能进行评论。

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