But birds are not the only ones at risk.
但不仅仅是鸟类有这种危险。
But birds don't have 'em, nor do reptiles or fish.
但是鸟类没有血小板，爬行动物和鱼类也没有。
But birds have an extra cone for seeing violet and ultraviolet light.
但是鸟类多了一种锥体，能识别紫色光和紫外线。
Some birds like eating locusts, but birds cannot easily catch them.
一些鸟喜欢吃蚱蜢，却很难逋到。
He has conspired against me like the rest, and they are but birds of a feather.
他和其余的人一样阴谋同我作对，他们是一丘之貉。
But birds, butterflies, and insects frolicked there, and it was the paradise of my childhood.
但是，那儿是鸟儿、蝴蝶和各种各样的昆虫嬉戏的地方，也是我童年时代的乐园。
But birds never fly too high, because the air in the high sky is too thin, they can not live in thin air.
但是，鸟们不能飞太高，因为高空的空气稀薄，他们在稀薄的空气里无法生存。
Things like iPods you just have to knock off the list, but birds in the trees around my kitchen have become my new iPod.
像iPod这类东西，我直接从清单上划去，不过，在我厨房四周林间的鸟儿成了我新的iPod。
But birds are far less likely to suffer from the clot formation called economy class syndrome-despite being frequent fliers.
但尽管小鸟是空中常客，它们不太可能患上我们容易患上的经济舱综合征。
They may not have verbs, nouns or past participles, but birds challenge the notion that humans alone have evolved grammatical rules.
它们可能没有动词、名词和过去分词，但是鸟类挑战只有人类演化出语法规则这一观念。
Ironically, the answer is that birds see many more colors than humans can, but birds are also capable of seeing many more colors than they have in their plumage.
答案颇具讽刺意味，实际上鸟类能分辨的颜色远远多于我们人类，并且它们还能分辨出它们羽毛之外的色彩。
But sometimes certain species of birds do the exact opposite.
但有时，某些种类的鸟类却会做出相反的举动。
But just some 22,000 birds remain today, occupying about 16% of the species' historic range.
但如今仅存的鸟类只有约22000只，约占该物种有史以来数量的16%。
But, and this is important, their clutch volumes matched those of birds that have only male parental care.
但是，这一点很重要，它们的繁殖量与那些只有父方抚养幼儿的鸟类的数量相当。
Birds like this Harris Hawk can fly where they want to, but have been trained to come back for food.
像这种哈里斯鹰可以飞到任何它们想去的地方，但是经过训练它们会回来觅食。
He looked around at the birds, but alas!
他看了看四周的鸟，但是，唉！
I have this theory that, to us the world is a flat thing we stand on, but to birds it is a cliff they cling to.
我有一种想法，就是对我们来说，世界是一个我们所站立的平坦的东西，而对鸟来说是一个它们所依靠的峭壁。
As the name suggests, you'd be following the river for most of the way, and you get to see some of our beautiful native birds, but the track also goes through a densely forested area.
正如其名，你们的大部分路线是沿着河走的，你们会看到一些我们本地美丽的鸟类，但这条路线也会穿过一片密集林区。
Landfill sites on the Iberian peninsula have long attracted local white storks, but all of the Spanish birds tagged in the study flew across the Sahara desert to the western Sahel.
伊比利亚半岛上的垃圾填埋场长期以来一直吸引着当地的白鹳，但研究中标记的所有西班牙鸟类都飞越了撒哈拉沙漠，来到了萨赫勒的西部地区。
Raptors look quite a bit like dinosaurs but they have much more in common with birds than they do with other theropod dinosaurs such as Tyrannosaurus.
迅猛龙看起来有点像恐龙，但是它们与其他兽脚类恐龙比如暴龙相比，与鸟类更相似。
Pigeons are often seen as dirty birds and an urban nuisance, but they are just the latest in a long line of animals that have been found to have abilities to help humans.
人们常把鸽子视为肮脏的鸟类或是城市的公害，但他们只是众多有能力帮助人类的动物中的最新一员。
Ducks are birds that feed and breed in areas where there is a lot of water, but their habitats have been shrinking in recent decades because of the droughts.
鸭子是在有大量水的地方觅食和繁殖的鸟类，但近几十年来，由于干旱，它们的栖息地一直在缩小。
The ivory-billed woodpecker is not large, as birds go. It is about the size of a crow, but flashier.
象牙喙啄木鸟不像鸟那样大。它的大小和乌鸦差不多，但更华丽。
The birds don't mean to cause harm, but the chemicals they carry can cause major problems.
这些鸟本意并不想造成伤害，但其携带的化学物质会引发重大问题。
The female birds have the same pattern as the males, but they are a little duller in color．
雌性鸟类与雄性鸟类有相同的图案，但是雌性鸟类的颜色更暗淡一点。
But city birds are not like other birds.
但是城里的小鸟跟其他地方的小鸟不一样。
Primates and birds' brains have evolved along different tracks, but ended up with similar abilities.
灵长类动物和鸟类的大脑沿着不同的轨迹进化，但最终拥有相似的能力。
Not only that, but most types of birds aren't so quick to abandon their young when they sense danger.
不仅如此，大多数种类的鸟类在感觉到危险时都不会那么快地抛弃它们的幼鸟。
Not only that, but most types of birds aren't so quick to abandon their young when they sense danger.
不仅如此，大多数种类的鸟类在感觉到危险时都不会那么快地抛弃它们的幼鸟。
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