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B1 中級 英語 6:45 1,257 単語 Science & Tech

Birds Get Divorced Too

SciShow · 118,840 回視聴 · 追加日 2ヶ月前

AI要約

This video explores the biological reality of **"bird divorce,"** shifting the focus from romantic myths to evolutionary science. Learners will gain a clear understanding of why avian pair bonds break, moving beyond human sentimentality to explore **selective pressures**. The lesson covers key factors driving these splits, including: * **Reproductive success:** Birds often part ways if they fail to produce healthy offspring. * **Demographics:** How skewed sex ratios and partner availability influence "divorce" rates. * **Competition:** Tactics like harassment used by rivals to break up established pairs. By the end, viewers will understand that bird mating strategies are practical adaptations designed to maximize genetic survival.

学習統計

B1

CEFRレベル

1,257

総単語数

503

ユニークな単語

5/10

難易度

語彙の多様性 40%

字幕 (110 セグメント)

00:00

It’s a shame when two humans  have to go their separate ways.

00:03

But usually, we can also see  that they’re better off for it.

00:06

Divorce is just one of those  realities we have to put up with.

00:08

And yet for some reason, we’re much more romantic  when it comes to animals, especially birds.

00:14

TV documentaries tell us they  “mate for life,” and we picture  

00:18

them lovingly hatching chicks together  and caring for them in perpetual bliss.

00:21

Which is by no means always the case.

00:24

Birds will cheat, run away, and yes, divorce.

00:28

Even in species that supposedly mate for life.

00:30

Here’s why some birds might find  themselves in divorce court.

00:34

[♪ INTRO]

00:37

First off, we should probably clarify  the language we’re using here.

00:41

“Divorce” is the term used in the  literature for when these pairs split up.

00:44

Many birds will have a pair bond where a male and  

00:47

female couple will raise that  season’s young with each other.

00:49

That’s the classic, warm fuzzy bit we all know.

00:52

The real question is whether or not  they come back together again next year.

00:56

If they do, the pair bond is going strong.

00:58

If not, the pair bond is broken –  what the literature calls a divorce.

01:02

But unlike humans, who split up for personal,  economic, or any number of different reasons,  

01:08

birds are just responding to selective  pressures in their environment.

01:11

These birds may be the stuff of daytime  talk shows, but in this episode,  

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重要な語彙 (44)

you A1 pronoun

あなたは親切です。(You are kind.)

problem A1 noun

問題とは、解決が必要な困難な状況のことです。例えば、「車に問題があります」。

reason A1 noun

理由とは、何かが起こった原因や説明のことです。

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