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以色列军方的无人机,如何成了兀鹫孤儿的“代理妈妈”

一只尚未离巢的小秃鹫因为意外失去了母亲,不过,一位人类派来的特殊母亲,成功使它活了下来。

虽然秃鹫并不是濒危物种,但在它的一些栖息地,它们的数量在不断变少,这也引起了鸟类学家的注意。以色列是西域兀鹫的栖息地之一,1950年代前,以色列曾遍布西域兀鹫。但到了21世纪初,以色列境内仅有120对西域兀鹫,而今天,据专家估计,数量大约只有60对。

因此,从2015年起,以色列自然保护协会发起了一个猛禽监控项目Raptor Nestcam,用架设摄像机和贴标签的形式,监测以色列的四种大型食肉鸟类的生存状态,其中就包括西域兀鹫。该项目在它们的一些巢穴附近设置了摄像头来观察它们。

一只已被打上标签的西域秃鹫

3月12日,一个摄像头拍到在以色列的内盖夫沙漠南部悬崖峭壁上的一个西域兀鹫巢穴里,一只小兀鹫出生了。

西域兀鹫家庭是一夫一妻制的,它们共同抚育这只雏鸟。一切都很顺利,直到6月初,母兀鹫不小心落到了一处输电线上,被电击身亡。

公兀鹫并没有放弃小鸟,在Raptor Nestcam的官方博客中写道,“看到公鸟依然在尽职尽责地完成它的工作,让我们非常感动。”

但由于兀鹫必须飞到很远很远的地方去寻找腐肉,它无法为雏鸟提供足量食物,保护专家们开始尝试帮助雏鸟。

小秃鹫接到投喂的食物

原本,专家们决定派人爬上悬崖,将雏鸟带回人工饲养。但后来有人提出了另一解决方案,提议使用无人机作为它的临时母亲。

一家前沿无人机公司XTEND提供了一架隐身无人机,它的飞行不会对雏鸟和在附近筑巢的其他鸟类造成威胁。它还可以为操作者提供飞行员视角,模拟操作者坐在飞机驾驶座上操控飞机的感受。

以色列军方也加入了进来。军队在其一个基地内搭建了一个模拟巢穴,供操作者提前练习了好几个小时,以便实际应用时能准确把食物投放到兀鹫巢穴。

开始投喂后,无人机每2到4天前往巢穴一次,为雏鸟带去食物和维他命等营养补充剂,将它们留在悬崖边缘。可以看到,雏鸟并不惧怕无人机,待它一走,雏鸟便取走食物,大快朵颐。

兀鹫爸爸也依旧在为雏鸟带回食物。摄像头观察到小鸟开始经常性地练习拍打翅膀,学习飞行。在近两个月过后,7月26日,无人机第一次拍摄到了小兀鹫起飞的画面,这意味着小兀鹫可以渐渐自己学会觅食,不再等待投喂,而人类也完成了照顾它的任务。

摄像头拍到的起飞画面

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