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This is Scientific American's 60-second Science, I'm Jason Goldman.
Got a minute?
They grow to about 20 inches long and weigh less than 10 pounds. So you might not think they'd be the closest living relatives to elephants.
Meet the rock hyrax, sometimes called the rock rabbit or the dassie, common in rocky areas of Africa and the Middle East.
They live in groups of up to 80 individuals.
"The hyraxes are a mammal that has a rare phenomenon, which is singing.
We know a lot of birds sing, but we don't have many mammals that actually perform a song, a complex song with different syllables coming in bouts.
And these bouts are complex. And along the song, they get more and more complex, they get longer, they include more sounds."
Biomusicologist Yishai Weissman from Bar-Ilan University and Hebrew University in Israel.
"We've tried to understand the meaning of all this―why a hyrax would waste time and energy and expose himself to predators by singing such a loud song."
Weissman and his team recorded the songs of male hyraxes during mating season, and they analyzed their structure.
"We found that the song is an advertisement for male quality.
And in the song, the rarest thing, most interesting element, is the snort.
这里是科学美国人――60秒科学系列,我是杰森・古德曼。
有一分钟时间吗?
它们长到大约20英寸长,体重不到10磅。所以你可能不会认为它们是大象的近亲。
来认识一下岩蹄兔,有时被称为岩兔或蹄兔,常见于非洲和中东的岩石地区。
它们群居生活,最多可达80只个体。
“岩蹄兔是一种哺乳动物,它有一种罕见的现象,那就是唱歌。
我们知道很多鸟类会唱歌,但我们不知道许多哺乳动物也会唱歌,这是一种复杂的有不同音节的歌声。
这些音调很复杂。而且随着歌曲的发展,音节会变得越来越复杂,越来越长,并包含更多声音。”
以色列巴伊兰大学和希伯来大学的生物音乐学家伊沙・魏斯曼说到。
“我们试图理解这一切的意义,为什么岩蹄兔会浪费时间和精力,这么大声地唱歌,将自己暴露在捕食者面前。”
魏斯曼和团队记录了雄性岩蹄兔在交配季节的歌声,并分析了这些歌声的结构。
“我们发现这首歌是雄性品质的广告。
在这首歌中,最稀有、最有趣的元素是喷鼻息声。
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