鸟类普遍被认为是从恐龙进化而来的。
无可争辩的是，鸟类携带着这种疾病。
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？
并非所有的鸟类都在树枝上筑巢。
鸟类因食用塑料吸管和瓶盖而死亡。
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。
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。
我几乎每天都带着枪出去猎食动物和鸟类。
I go out with my gun almost every day to kill animals and birds for food.
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.
对鸟类的研究可能会对睡眠提供独特的见解。
老式风车能杀死鸟类是因为它们旋转得很快。
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.
所有恐龙都是鸟类。
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.
天空中这个物体的翅膀显然太短太宽了，不是鸟类。
The object in the sky apparently had wings far too short and wide for a bird.
"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.
如果你想在增加当地鸟类数量，请准备好采取必要的措施来消除那些你想与之和谐相处的鸟类所带来的隐患。
If you start a local increase of birds, be prepared to do what may be required to eliminate hazards to those you want to befriend.
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.
研究鸟类对保护鸟类很重要。
鸟类在冬季很少露面。
未来，他们希望鸟类能住在鸟窝里，鸟窝中绿光的热量可以用于给鸟类在冬天保暖。
In the future, they hope birds will live in the birdhouse and the heat of its green light will be used to keep birds warm in winter.
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