Like bats they use echolocation to navigate. 和蝙蝠一样 它们也利用回声定位来导航 We need lights to see what's going on, 我们必须有光才能看清前方的路 but in the pitch black the swiftlets manage unerringly to locate their individual nesting sites, 但是金丝燕却能在黑暗中 准确无误地到达自己...
We need lights to see what's going on, 我们必须有光才能看清前方的路 but in the pitch black the swiftlets manage unerringly to locate their individual nesting sites, 但是金丝燕却能在黑暗中 准确无误地到达自己的筑巢点 which are only a few centimetres across. 而它们的巢窝相隔不过几厘米远 It&...
but in the pitch black the swiftlets manage unerringly to locate their individual nesting sites, 但是金丝燕却能在黑暗中 准确无误地到达自己的筑巢点 which are only a few centimetres across. 而它们的巢窝相隔不过几厘米远 It's a remarkable skill and one we still do not fully und...
which are only a few centimetres across. 而它们的巢窝相隔不过几厘米远 It's a remarkable skill and one we still do not fully understand. 我们至今仍未能完全了解 这种了不起的本领 These birds are unusual for another reason. 这些鸟之所以特别还有另外一个原因 Their little cup-like nests are ...
There's a day shift as well. 这里也有“做日班”的居民 Returning from hunting in the sunlight 完成白天的狩猎工作后 these commuters rely on their loud clicks to find their way through the cave passages in total darkness. 这些住客利用它们响亮的叫声 在漆黑一片的洞穴通道内辨别方向 They'...
Returning from hunting in the sunlight 完成白天的狩猎工作后 these commuters rely on their loud clicks to find their way through the cave passages in total darkness. 这些住客利用它们响亮的叫声 在漆黑一片的洞穴通道内辨别方向 They're cave swiftlets. 它们就是洞金丝燕 Like bats they use...
these commuters rely on their loud clicks to find their way through the cave passages in total darkness. 这些住客利用它们响亮的叫声 在漆黑一片的洞穴通道内辨别方向 They're cave swiftlets. 它们就是洞金丝燕 Like bats they use echolocation to navigate. 和蝙蝠一样 它们也利用回声定位来导航 We n...
They're cave swiftlets. 它们就是洞金丝燕 Like bats they use echolocation to navigate. 和蝙蝠一样 它们也利用回声定位来导航 We need lights to see what's going on, 我们必须有光才能看清前方的路 but in the pitch black the swiftlets manage unerringly to locate their individual...
becomes a clear and obvious target and is asking for trouble. 立刻成为显眼的目标 很快便遭了殃 Yet the nightly onslaught has little impact on bat numbers - 然而 每天傍晚的攻击只会 对蝙蝠数量产生很小的影响 by the morning the vast majority will be back in the safety of the cave. 到...
Yet the nightly onslaught has little impact on bat numbers - 然而 每天傍晚的攻击只会 对蝙蝠数量产生很小的影响 by the morning the vast majority will be back in the safety of the cave. 到了早上 大多数蝙蝠 仍会安然无恙地回到洞中 Bats are not the only commuters in these Bornean caves. 蝙...