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一个物种灭绝，一群生物链断了。啄木鸟绝了，树本内部的蛀虫没有天敌，吃虫的其它鸟，吃不到本头里面的虫，蛀虫会加快繁殖，森林会慢慢枯萎！以树叶为食和以树枝栖身的虫，鸟动物会逃离这片森林。生态将不复存。新的生态链建立，非一朝一夕！

老鼠和人类的DNA相似度百分之九十九，所以，不用怀疑