5Why do birds sing?燕子呢喃,喜鹊喳喳叫,它们似乎无比快乐。让我们走进鸟儿的世界一窥其奥秘。1Have you ever wondered why birds sing? Maybe you thought that theywerejust happy. After all you probably sing or whistle when you are happy.Some scientists believe that birds do sing some of the time...
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早上起得够早的话，在你所住的地方也许能听到一阵悦耳的鸟鸣。在清晨歌唱是鸟的本能行为，但是鸟鸣为什么都在清晨呢？According to the Woodland Trust, this early singing is known as the dawn chorus, and it can start as early as 4 am and last for several hours. Birds do it to attract mates an...
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声音简介 When birds sing, what do you think they’re saying? In this episode we head to the park with Simon Griffith to listen to the birds. Put your listening ears on and get ready to hear some amazing singers. 用户评论 表情0/300发表评论 睛滨 赞 2024-06回复赞 berryzuzu 我今晚上🌃...
Research from the last few decades paints a different picture of songbirds. Recent work suggests that female song was the norm for the ancestors of modern songbirds. And many female birds still sing today: It is estimated that female song occurs in about two-thirds of all songbird species. ...
Do you love birds? If you do, you’re not alone! Birds are fun to watch and they make great pets. There is so much to know about birds. Why do they have feathers? Can parrots really talk? Why do birds build nests? Do birds like toys? Beginning readers will find the answers to ...
1.阅读下面短文,从每题所给的 A、B、 C、D四个选项中选出最佳选项。Why birds sing is relatively well-answered. They
Dawn chorus Sound transmission Sound degradation Bird song Communication networksAmong the ideas proposed to explain the existence of the dawn chorus in songbirds, the acoustic transmission hypothesis claims that birds sing most intensively at dawn because this is the time of the day when songs suffer...
绘本《Why Do Birds Sing》,Penguin 绘本内容 Birds are fun to watch, and they make great pets. There is so much to know about birds! Why do birds have feathers? Can parrots really talk? Why do birds build nests? Find the answers and much more inside. ...