[解析]
(1)A.细节题.根据文章内容,Earlier studies found that many but not all birds in California's mountains are moving north or to higher altitude to find cooler temperatures in the face of global warming.由此可知,有些鸟儿面对全球变暖带来的危害,他们飞到北方或者纬度更高的地方寻找更凉爽的地方.结合选项,故选A.
(2)C.推理题.根据文章内容,为了适应天气变化,鸟儿们选择迁徙,由此推知,它们在适应气候方面是聪明的.结合选项,故选C.
(3)A.主旨题.根据文章内容,主要讲述了面对全球变暖这一气候因素,很多鸟儿为了更好的生存,选择迁徙到更冷的北方或者高纬度地区,以及它们这一行为存在的一些问题等.结合选项,故选A.
(4)C.作者态度题.根据文章内容,The good news is that there may be more flexibility for species to respond to climate change than we thought,and not all species may need to move farther north or to higher altitudes.由此可知,对于鸟儿的迁徙而言,好消息就是它们有足够的灵活来对天气变化作出反应,那样至少不用所以的鸟儿都飞到北方或者更高纬度去寻找更佳的栖息地.结合选项,故选C.