Compared with humans, you might not think of birds as social animals. (I mean, you hardly ever see geese hanging out at the mall.) But look skyward when great flocks of birds migrate toward their feeding grounds. Many...Compared with humans, you might not think of birds as social animals. (I mean, you hardly ever see geese hanging out at the mall.) But look skyward when great flocks of birds migrate toward their feeding grounds. Many of these birds not only fly and feast together, but also breed in huge colonies and join forces to fend off predators.展开更多
文摘Compared with humans, you might not think of birds as social animals. (I mean, you hardly ever see geese hanging out at the mall.) But look skyward when great flocks of birds migrate toward their feeding grounds. Many of these birds not only fly and feast together, but also breed in huge colonies and join forces to fend off predators.
