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If the irrigation plan goes ahead, it could spell disaster for the birds.如果灌溉计划开始实施，它可能会给鸟类带来灾难。She never lost interest in the birds' morning feeding activities, migrations, mating habits.她对鸟类的早晨觅食活动、迁徙及交配习惯一直感兴趣。Man has tamed the jungle but, as a result, many kinds of birds and animals have disappeared.人类征服了丛林，可是其结果是许多种鸟类和野兽都绝迹了。Some species may nest in close proximity to each other.一些鸟类会彼此紧挨着筑巢。Wings and feathers discriminate birds from other animals.翅膀和羽毛使鸟类区别于其他动物。The rain forests are rich in birdlife. 雨林地区鸟类繁多。These facts are based on close observation of the birds in the wild.这些事实基于对野生鸟类的仔细观察而得出。All the big game congregate here, and birdlife is particularly prolific.所有的大型猎物都聚集在这里，鸟类尤其丰富。Recent evidence supports the theory that birds descended from dinosaurs.近期的证据为鸟类起源于恐龙的理论提供了支持。You learn to recognize the calls of different birds.你学着去识别不同鸟类的鸣叫。Birds usually migrate from north to south.鸟类通常从北向南迁徙。Most birds eat nuts and berries.大多数鸟类都吃坚果和浆果。Lake Baringo is a freshwater haven for a variety of birds.巴林戈湖是各种鸟类的淡水栖息所。This book is a treasure house of information on Arctic birds.这本书是关于北极鸟类的知识宝库。These sorts of birds live in more wooded areas.这些鸟类栖息在树木更加茂盛的地区。Monogamy is rare in most animal groups, but is common among birds.单配偶现象在大多数动物群体里很少见，但在鸟类中却很常见。Several bird species are threatened with extinction. = Several bird species are on the brink of extinction.几种鸟类濒临灭绝。How do birds know when to migrate, and how do they find their way back home?鸟类是如何知道何时迁徙，它们又是如何找到归家之路的呢？Birds dispersed the seeds.鸟类将种子散播开来。The area has a great diversity of birds.这个地区鸟类繁多。The many different habitats support a wide variety of birds.多种多样的栖息地使各种鸟类得以生息。Walkers can unwittingly damage the fragile environment in which the birds live.徒步旅行者可能无意中破坏鸟类生活的脆弱环境。Birds control insect pests.鸟类控制虫害。Birds and monkeys can carry disease.鸟类和猴子能传播疾病。He specialized first in painting birds and later in writing about them.他开始专门画鸟，后来又专门写关于鸟类的文章。Birds have developed a sexual difference in the colours of their feathers.鸟类在羽毛的颜色上显出雌雄差异。The trade in exotic birds is barbarous.买卖珍奇鸟类是很残忍的。The organization is ever vigilant for threats to the habitats of birds.该组织对鸟类栖息地所面临的种种威胁始终保持警惕。Visitors to the aviary can observe the birds behaving naturally.参观该鸟舍的游客能观察到鸟类的自然习性。The birds are additionally protected in the reserves at Birsay.鸟类在伯赛的保护区尤其受到保护。He has made a special study of the way that birds communicate.他就鸟类互相交流的方式进行了专门研究。The owl is a predatory bird that kills its prey with its claws.猫头鹰是一种捕食性鸟类，它用爪子杀死猎物。The white stork is one of the biggest land birds of the region.白鹳是该地区最大的陆栖鸟类之一。Large numbers of birds migrate south every winter.每年冬季大量的鸟类迁徙南方。Scientists are debating the possible derivation of birds from dinosaurs.科学家们正在争论鸟类从恐龙演变而来的可能性。These rare birds are close to extinction.这些珍稀鸟类都已濒临灭绝。It is instinct that tells the birds when to begin their migration.是本能让鸟类知道何时开始迁徙。Where do birds come on the evolutionary scale?在演化等级中，鸟类处于什么位置？One of Tony's hobbies was collecting rare birds.托尼的业余爱好之一是搜集稀有鸟类。Birds make nests in preparation for breeding.鸟类筑巢准备产蛋。 |