【听力文摘】研究表明：鸟类智商不算太糟

1、【听力文摘】研究表明：鸟类智商不算太糟research shows bird brai ns are nt so badthe next time some one calls you a “bird brain,” you should thank them.changing opinionsneuroscientists opinions about the brains of birds have changed. in humans and othermammals,the roof of the forebrain has evolved into the cerebral cort

2、ex, a structure respo nsiblefor flexiblelearning and reasoning.early neuroanatomists thought that the forebrain roof was small and simple in birds, withitsforebrain instead being dominated by structures in its base, called the basal ganglia.without anelaborate forebrain roof, it seemed that birds co

3、uldnt be very smart.new researchrecent research shows that birds are a lot smarter than scientists once thought. to give justafew examples, the new caledonian crow can manufacture and use tools. the africa n greyparrotcan learn to classify objects into categories, and the rorida scrub jay stores foo

4、d in dozens ofcaches and can remember their locations for future use.it turns out that neuroanatomists had it all wrong about bird forebrains. during more tha n300million years of separate evolution, the forebrain roofs of birds and of mammals ea ch grewlargerand more elaborate, but in different ways the roof of a birds forebrain is so different fromthecerebral cortex of a mammal that the n euroa nato mi