英語聽力 學(xué)英語,練聽力,上聽力課堂! 注冊 登錄
> 在線聽力 > 有聲讀物 > 英語雜志 > 英語聽力文摘 >  第194篇

英語聽力文摘 蝴蝶戰(zhàn)役

所屬教程:英語聽力文摘

瀏覽:

手機版
掃描二維碼方便學(xué)習(xí)和分享
https://online2.tingclass.net/lesson/shi0529/0007/7643/178.mp3
https://image.tingclass.net/statics/js/2012

Flutter Battle

你喜歡蝴蝶嗎?你了解蝴蝶嗎?有的人認為蝴蝶是非常紳士的物種,讓我們一起去了解真實的情況吧。

'Flutter Battle' on today's A Moment Of Science.

One thinks of nature as “red in tooth and claw,” as the old saying goes. Species compete with each other for resources, and members of the same species compete with each other for mates. There’s a lot of scratching and biting going on. Unless you’re a butterfly.

People love butterflies for their gentleness. According to new studies, that soft, fluttery quality persists all the way down to butterfly battles. Yes, male butterflies compete for the attentions of female butterflies. In fact, some males compete by fluttering.

Researcher Darrel Kemp, who is now at Arizona State University in Tempe, worked on an Australian butterfly called Hypolimnas bolina.

As is the case with many species, the male Hypolimnas bolinas seek to mate with as many females as possible, but the females only mate once. At any given time the vast majority of females aren’t in a sexually accommodating state, and the males have to duke it out for the few who are.

How do they battle? Locking horns? Beating their chests? No. They flutter around in a circle. The two competing males never even come in contact, but at a certain point one of them accepts defeat and sails away.

What decides winner and loser in a butterfly battle? It isn’t clear yet. Kemp has studied all kind of parameters, from body size to wing span.

The only consistent factor he found was age. Older butterflies–by old we mean almost three months–win out over younger ones. Maybe the kids just don’t have what it takes for a hard-core flutter-off.

用戶搜索

瘋狂英語 英語語法 新概念英語 走遍美國 四級聽力 英語音標(biāo) 英語入門 發(fā)音 美語 四級 新東方 七年級 賴世雄 zero是什么意思成都市合能珍寶玲瓏英語學(xué)習(xí)交流群

網(wǎng)站推薦

英語翻譯英語應(yīng)急口語8000句聽歌學(xué)英語英語學(xué)習(xí)方法

  • 頻道推薦
  • |
  • 全站推薦
  • 推薦下載
  • 網(wǎng)站推薦