SSS 2011-04-28
时间：2018-12-24 作者：英语课 分类：Scientific American(四)月
Cities have a lot to offer, theater, music, restaurants, birds...Yes, birds.
But city birds are not other birds, because big cities inhabited by birds with big brains, that's according to a study in the Journal Biology Letters.
It can take smarts to to survive in the big city, especially for birds, the open environment is very different the one which their ancestors were born and fledged, but the city birds really need more gray matter to make it.
Scientist surveyed 82 species of passerine birds, including sparrows, pigeons any thing that perches 1 in and around 12 cities in central Europe, they classify the birds those that bred in the Heart of the city, or those that avoid the hustle 2 and bustle 3.
And then they compare the bird brains,the results, birds that prosper 4 around the city street, have larger brains than their pastoral relations.
So they it seems novel environments including open landscapes may select for street smarts, at least for birds that flown toward the city lights, urban area that continues to spread, so to survive, our feathered friends may need to spend their mind as they spread their wings.
- Other protection can be obtained by providing wooden perches througout the orchards. 其它保护措施是可在种子园中到处设置木制的栖木。
- The birds were hopping about on their perches and twittering. 鸟儿在栖木上跳来跳去，吱吱地叫着。
- It seems that he enjoys the hustle and bustle of life in the big city.看起来他似乎很喜欢大城市的热闹繁忙的生活。
- I had to hustle through the crowded street.我不得不挤过拥挤的街道。