本帖最后由 taoyukun-daidai 于 2010-7-6 22:09 编辑
红色没听出来
蓝色听错了
绿色拼写错误
Before we continue, you should understand an important concept. That is the notion of a culture area. A culture area is not a colony of artist but the geographic area in habitat by different people with similar cultures. A culture area is relatively consistent in term of land features. For instance the land is completely mountains or flats and the climate. There are similarities in the kind of plants and animals and settlers. I take what I call a bottom-up approach to study of
the culture. That does not mean that I go to those sites or people are digging
for artifact but rather it means that I think of culture as something it grows out of the daily needs of people's lives, like finding foods or protecting themselves against weather. The routines and social order the people create in order to deal with these things form the culture. So Inuit peoples live in what is now Alaska, people whose surrounding are cold and not fit for agriculture and who depend on fishing. You can imagine how their routines differ from Anasazi people who live in warm dessert region. So if that is clear to everyone, We can continue. So moving on. Anthropologists feel that in what is now United States and Canada there are 9 culture areas. We will exam all of them in the next few weeks, but for now let's start with our own area.
You know, it is kind of fashionable among students of birds to study well and exhausted species, especially in danger ones like golden eagles and spotted owls, but I often think that everyday-birds, birds that really are part of our lives are simply overlooked. So I’d like to spend some time talking about a very common bird “black crows”. It might surprise you to know that crows are among the most challenging birds to observe and study. First of all, they look alike. Picking out one or several individual crows in a flock in finding them again later is almost impossible. People study in larger animals can put some kind of mark on them so they can tell them apart. Well, you can trap larger animal like a bear in a mobilized or a tranquilized gun. Then it is easy to put a tag on it. But try doing that to a crow you probably kill it. Secondly, crows are highly intelligent survivors. They adapt easily to wildly varying situations. This adds to the difficulty of studying in them because they pick up so many individual allies habits. So you can never be sure about any conclusion you reach about crows from observing them applies to the whole species or just those particular crows you being watching. One general observation about crows that can not be made the reasonable degree of certainty is that in the last 40 years more and more crows have been found living in large cities. They are attracted by
people who produce a normal surmount of garbage and leave them places that crows can easily get to, it make for distances they must travel to hunt a lot shorter. | 
楼主: taoyukun-daidai
发表于 2010-7-3 10:19:54
转发
签到领寄托币
GO
