鸟类普遍被认为是从恐龙进化而来的。
很多鸟类具有了不起的返回原地的本能。
鸟类、海洋生物以及海岸线都遭到重创。
雪雁是种群居的鸟类。
大多数的鸟类不得不飞行很长的距离进行迁徙。
为什么新的风车不会杀死鸟类？
鸟类因食用塑料吸管和瓶盖而死亡。
并非所有的鸟类都在树枝上筑巢。
它们将成为第二大灭绝的鸟类。
They will tum out to be the second-largest species of birds to become extinct.
鸟类以到处搬运东西而闻名。
克鲁教授称这个答案是受到鸟类的启发。
与灵长类动物相比，鸟类的大脑太小了。
鳄鱼、乌龟、鸟类和昆虫似乎很少受到影响。
Crocodiles, tortoises, birds, and insects seem to have been little affected.
加州秃鹰是北美最大的鸟类，翅膀长达3米。
California condors are North America's largest birds, with wing-length of up to 3 meters.
例如，几种鸟类以被放牧牛驱赶的昆虫为食。
For instance, several kinds of birds feed on insects flushed out of the grass by grazing cattle.
对鸟类的研究可能会对睡眠提供独特的见解。
北极狐主要以鸟类、鸟蛋和其他小动物为食。
The Arctic foxes feed mainly on birds, birds' eggs and other small animals.
翼龙的整体结构和比例与鸟类和蝙蝠都很相似。
The pterosaurs resembled both birds and bats in their overall structure and proportions.
深度睡眠时，参与者的大脑表现与鸟类、海豚相似。
During deep sleep, the participants' brains behaved in a similar manner seen in birds and dolphins.
"鸟类和其他动物懂得使用树枝或其他工具寻找食物。
Using sticks or other tools to find food isn't unknown among birds and animals.
因此，博物馆计划扩建大厅，并增加其古代鸟类藏品。
As a result, the museum plans to expand the hall as well as add to its ancient bird collection.
鸟类在长途迁徙飞行之前，会用大量的食物喂肥自己。
Birds will fatten themselves with heavy feeding in advance of a long migrational flight.
恐龙现存的近亲——鸟类和鳄鱼——表现出了筑巢行为。
Dinosaurs' closest living relatives—birds and crocodiles—display nesting behavior.
这些乱石坑已经被美化，种了树来吸引野生鸟类。
The gravel pits have been landscaped and planted to make them attractive to wildfowl.
他甚至开始注意到树木和鸟类。
鸟舍现在不能作为鸟类的家了。
他找了一些鸟类的视频给怀亚特看。
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