首页
登录
职称英语
What does the speaker cite as an introduction to the topic? [br] [originaltext]
What does the speaker cite as an introduction to the topic? [br] [originaltext]
游客
2025-01-17
21
管理
问题
What does the speaker cite as an introduction to the topic? [br]
In the classic story, a boy tries to repeatedly fool his town into believing that there is a wolf on the prowl. This morality tale ends poorly for the boy, but a small Australian bird can do one better. When a pied currawong goes looking for brown thornbill nestlings to eat, the thornbill parents call wolf — or, actually, they call hawk. The false alarms fool the currawong into thinking that its own predator, the brown goshawk, is nearby. The tiny thornbill thus effectively outsmarts its large enemy.
To explore how this sophisticated ruse works, biologist Branislav Igic and his colleagues positioned a taxidermied currawong near thornbill nests while broadcasting nestling distress calls. The thornbills sounded their hawk alarm calls and even mimicked the alarms of other species. Igic also tested 18 currawongs by broadcasting the sounds of the thornbills’ mimetic and nonmimetic hawk calls. He found that the playback discouraged the currawongs from hunting.
The researchers think that alarm calls from what sounds like multiple callers might make the warning seem more reliable. Birds can adapt some very interesting and unique strategies to protect their young. The thornbills’ own hawk calls fooled the currawongs for 8. 3 seconds on average, but when Igic included the mimicked calls, too, the currawongs were distracted twice as long. That padding may provide enough time for the nestlings to escape the nest.
选项
A、To protect the nestlings.
B、To defeat the enemy.
C、To attract other callers.
D、To search for more food.
答案
A
解析
原文指出这是鸟类保护幼鸟的有趣而又独特的策略。
转载请注明原文地址:https://tihaiku.com/zcyy/3916098.html
相关试题推荐
Whatdoesthispassagetalkabout?[br][originaltext]Facebookistakingav
Whatdoesthispassagetalkabout?[br][originaltext]Facebookistakingav
Whatdoesthispassagetalkabout?[br][originaltext]Facebookistakingav
Whatdoesthispassagetalkabout?[originaltext]Facebookistakingaveryun
Whatdoesthepassagemainlytalkabout?[br][originaltext]Agrowingnumber
WhatisthesimilaritybetweenDanoneandDeoleo?[br][originaltext]TheFre
WhatisthesimilaritybetweenDanoneandDeoleo?[br][originaltext]TheFre
WhatisthesimilaritybetweenDanoneandDeoleo?[originaltext]TheFrenchgo
WhichplaceisnotintheplanofWenZhong?[br][originaltext]WenZhongis
WhichplaceisnotintheplanofWenZhong?[originaltext]WenZhongistakin
随机试题
TheTajMahalistoopenonmoonlitevenings20yearsaftersecurityfearse
AccordingtopsychologistSharonDraper,ourclothingchoicescanabsolutely
Scratchythroats,stuffynosesandbodyachesallspellmisery,butbeinga
MarilynwillnotbeabletocometotheChristmaspartyassheis______witha
[originaltext]AhugestormthatcollapsedpartofacliffonIsrael’scentr
根据库存的目的进行分类,库存包括()A.生产加工和运输过程的库存 B.半成品
治疗肝病,宜选用的腧穴是( )。A.期门 B.神门 C.章门 D.梁门
案例八 一般资料:求助者,男性,20岁,大学生。案例介绍:两个多月前,求助者在
地铁车站的通过能力应按该站远期超高峰设计客流量确定。超高峰设计客流量为该站预测远
采用调查打分法获取风险影响评价值,应有评定专家数、风险等级值和()参数。A.专
最新回复
(
0
)