有些鸟类不但以它们的体态、颜色和嗓音吸引人，它们对于人类还有着其它实实在在的用处，让人对它们更为疼爱有加。送奶鸟 在南美洲的玻利维亚有一种奇特的鸟，雌鸟腹部有一奶囊可分泌出许多营养丰富的奶汁。当地人常常以这种鸟的奶汁来哺育他们母乳不足的婴儿，因此这种鸟也 Some birds not only attract people with their posture, color, and voice. They also have other real uses for human beings, making them more loved and added to them. Sending milk birds There is a strange bird in Bolivia, South America. The female has a milk capsule on the abdomen that can secrete many nutrient-rich milk. The locals often use this bird’s milk to nurture their babies with insufficient breastmilk, so the birds are also