When the first birds appeared on earth about 150 million years ago, the insects were …… [ 展开全部 ]
here to greet them. Inevitably the two groups came to exploit each other, and as the eons passed, they became increasingly enmeshed in a complex web of interrelationships: birds eating bugs; blood-sucking insects feeding on birds; parasitic insects infesting birds; and birds struggling to rid t...(展开全部)
When the first birds appeared on earth about 150 million years ago, the insects were here to greet them. Inevitably the two groups came to exploit each other, and as the eons passed, they became increasingly enmeshed in a complex web of interrelationships: birds eating bugs; blood-sucking insects feeding on birds; parasitic insects infesting birds; and birds struggling to rid themselves of the parasites. In this text, Gilbert Waldbauer describes these and many other interactions between birds and insects. [ 收起 ]
