It’s one of the oldest moves in teen dating. Head to a scary movie. As soon as the scary music ____1____, your date cuddles closer for comfort. Well, some birds may have the same idea. Splendid fairy-wrens are small, sexually ____2____ birds native to Australia. It turns out that males get the attention of potential mates by making their move after a predator announces its presence. The research was published in the journal Behavioral Ecology.

[Bird sound] That’s the sound of butcher-birds, which ____3____ splendid wrens. Every time male wrens hear that cry, they sing this in response [wren sound]. Researchers say the calls become layered atop one another, almost like a duet.

The scientists tested the response of female wrens by playing recorded bird calls. They played just the male fairy-wren call. Then they played the ____4____ of the wrens singing immediately after the butcher-birds. The females became significantly more ____5____—looking to the sound or singing in response—after hearing the two calls together than they did if they heard just the wren. And so for both teens and wrens, a bit of fear might help a guy get the chick.
【视听版科学小组荣誉出品】
kicks in promiscuous prey on trill alert
青少年约会时去看恐怖电影已经见怪不怪了。恐怖音乐一开始，你的 约会对象就会抱紧你以求安慰。其实，某些鸟类也有这种想法。色彩 鲜艳的细尾鹩莺是澳大利亚的本地鸟类，它们体型娇小，而且喜欢性 滥交。现已证明这种雄鸟为了吸引潜在配偶的注意，会在食肉动物发 出声音后采取行动。该项研究刊登在《行为生态学》杂志上。 [鸟儿的声音]这是屠夫鸟的声音，它们会捕食这种美丽的鹩莺。每当 雄性鹩莺听到屠夫鸟的啼叫，它们就会这样回应[鹩莺的声音]。研究 人员表示，这种声音一层叠着一层，像二重唱似的。 科学家通过播放录制的鸟类啼叫来考察雌性鹩莺的反应。他们先单独 播放雄性细尾鹩莺的声音，然后再播放紧接着屠夫鸟叫声的鹩莺啭鸣 。与只听到鹩莺叫声相比，雌性鹩莺在听到两种声音混合时更加警觉 ，会盯着声音发出的地方。因此，对于青少年和鹩莺来说，一点点的 恐惧可以帮你泡到美眉哦。^-^