CHAPTER XVI.

 THE INSTINCTIVE¹ CLEVERNESS DISPLAYED BY BIRDS IN THE CONSTRUCTION OF THEIR NESTS.

 

The form of the nest built by the halcyon² reminds me also of the instinctive cleverness displayed by other birds; and, in no respect is the ingenuity³ of birds more deserving of our admiration⁴. The swallow builds its nest of mud, and strengthens it with straws. If mud happens to fail, it soaks itself with a quantity of water, which it then shakes from off its feathers into the dust. It lines the inside of the nest with soft feathers and wool, to keep the eggs warm, and in order that the nest may not be hard and rough to its young when hatched. It divides the food among its offspring with the most rigid⁵ justice, giving it first to one and then to another.

 

There is a kind of swallow that frequents the fields and the country; its nest is of a different shape, though of the same 210 materials, but it rarely builds it against houses. The nest has its mouth turned straight upwards⁶, and the entrance to it is long and narrow, while the body is very capacious. It is quite wonderful what skill is displayed in the formation of it, for the purpose of concealing⁷ the young ones, and of presenting a soft surface for them to lie upon. At the Heracleotic Mouth of the Nile in Egypt, the swallows present an insuperable obstacle to the inroads of that river, in the embankment which is formed by their nests in one continuous line, nearly a stadium in length; a thing that could not possibly have been effected by the agency of man. In Egypt, near the city of Coptos, there is an island sacred to Isis. In the early days of spring, the swallows strengthen the angular corner of this island with chaff⁸ and straw, thus fortifying⁹ it in order that the river may not sweep it away. This work they persevere¹⁰ in for three days and nights together, with such unremitting labor¹¹, that many of them die with their exertions¹².

 

A third kind of swallow makes holes in the banks of rivers, to serve for its nest. The young of these birds, reduced to ashes, are a good specific against mortal maladies of the throat, and tend to cure many other diseases of the human body. These birds do not build nests, and they take care to migrate a good many days before, if it so happens that the rise of the river is about to reach their holes.

1 instinctive   

adj.(出于)本能的；直觉的；(出于)天性的

参考例句：

• He tried to conceal his instinctive revulsion at the idea.他试图饰盖自己对这一想法本能的厌恶。
• Animals have an instinctive fear of fire.动物本能地怕火。

2 halcyon   

n.平静的，愉快的

参考例句：

• He yearned for the halcyon day sof his childhood.他怀念儿时宁静幸福的日子。
• He saw visions of a halcyon future.他看到了将来的太平日子的幻境。

3 ingenuity   

n.别出心裁；善于发明创造

参考例句：

• The boy showed ingenuity in making toys.那个小男孩做玩具很有创造力。
• I admire your ingenuity and perseverance.我钦佩你的别出心裁和毅力。

4 admiration   

n.钦佩，赞美，羡慕

参考例句：

• He was lost in admiration of the beauty of the scene.他对风景之美赞不绝口。
• We have a great admiration for the gold medalists.我们对金牌获得者极为敬佩。

5 rigid   

adj.严格的，死板的；刚硬的，僵硬的

参考例句：

• She became as rigid as adamant.她变得如顽石般的固执。
• The examination was so rigid that nearly all aspirants were ruled out.考试很严，几乎所有的考生都被淘汰了。

6 upwards   

adv.向上，在更高处...以上

参考例句：

• The trend of prices is still upwards.物价的趋向是仍在上涨。
• The smoke rose straight upwards.烟一直向上升。

7 concealing   

v.隐藏，隐瞒，遮住( conceal的现在分词 )

参考例句：

• Despite his outward display of friendliness, I sensed he was concealing something. 尽管他表现得友善，我还是感觉到他有所隐瞒。 来自《简明英汉词典》
• SHE WAS BREAKING THE COMPACT, AND CONCEALING IT FROM HIM. 她违反了他们之间的约定，还把他蒙在鼓里。 来自英汉文学 - 三万元遗产

8 chaff   

v.取笑，嘲笑；n.谷壳

参考例句：

• I didn't mind their chaff.我不在乎他们的玩笑。
• Old birds are not caught with chaff.谷糠难诱老雀。

9 fortifying   

筑防御工事于( fortify的现在分词 )； 筑堡于； 增强； 强化（食品）

参考例句：

• Fortifying executive function and restraining impulsivity are possible with active interventions. 积极干预可能有助加强执行功能和抑制冲动性。
• Vingo stopped looking, tightening his face, fortifying himself against still another disappointment. 文戈不再张望，他绷紧脸，仿佛正在鼓足勇气准备迎接另一次失望似的。

10 persevere   

v.坚持，坚忍，不屈不挠

参考例句：

• They are determined to persevere in the fight.他们决心坚持战斗。
• It is strength of character enabled him to persevere.他那坚强的性格使他能够坚持不懈。

11 labor   

n.劳动，努力，工作，劳工；分娩；vi.劳动，努力，苦干；vt.详细分析；麻烦

参考例句：

• We are never late in satisfying him for his labor.我们从不延误付给他劳动报酬。
• He was completely spent after two weeks of hard labor.艰苦劳动两周后，他已经疲惫不堪了。

12 exertions   

n.努力( exertion的名词复数 )；费力；（能力、权力等的）运用；行使

参考例句：

• As long as they lived, exertions would not be necessary to her. 只要他们活着，是不需要她吃苦的。 来自辞典例句
• She failed to unlock the safe in spite of all her exertions. 她虽然费尽力气，仍未能将那保险箱的锁打开。 来自辞典例句