There is a growing body of research indicating that drones can disturb animals. However, it is usually unclear whether the disturbance is due to visual or auditory cues. Here, we examined the effect of drone flights on the behaviour of great dusky swifts Cypseloides senex and white-collared swifts Streptoprocne zonaris in two breeding sites where drone noise was obscured by environmental noise from waterfalls and any disturbance must be largely visual. We performed 12 experimental flights with a multirotor drone at different vertical, horizontal and diagonal distances from the colonies. From all flights, 17% caused 50 m and that recreational flights should be discouraged or conducted at larger distances (e.g. 100 m) in nesting birds areas such as waterfalls, canyons and caves.

中文翻译：

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由于无人机的视觉方面测量快速繁殖群的干扰：一项准实验研究

越来越多的研究表明无人机可以干扰动物。然而，通常不清楚这种干扰是由视觉还是听觉线索引起的。在这里，我们在两个繁殖地点检查了无人机飞行对巨大的昏暗雨燕 Cypseloides senex 和白领雨燕 Streptoprocne zonaris 行为的影响，在这些地点，无人机的噪音被瀑布的环境噪音所掩盖，任何干扰都必须在很大程度上是视觉上的。我们使用多旋翼无人机在距殖民地不同的垂直、水平和对角线距离处进行了 12 次实验飞行。在所有飞行中，17% 造成了 50 m 并且应该劝阻或在更远的距离（例如 100 m）进行休闲飞行，例如在瀑布、峡谷和洞穴等鸟类筑巢区。