Black eggs have the highest nutritional value. \r\n Mountain eggs: North: Mountain eggs refer to the eggs produced by free-range chickens. They are natural and pollution-free. Eating real mountain eggs can taste the pure egg taste of free-range eggs, that is, native eggs and grass eggs. Mountain eggs in the south are understood as wild eggs. The eggs laid by pheasants. Compared with free-range mountain eggs, wild eggs are kept in captivity. Rarely are wild eggs really found in the wild. \r\n Native eggs: Native chickens that grew up on natural food in rural areas. It's similar to pheasant eggs, but it's a little worse than pheasant. \r\n Black-bone eggs: Black-bone eggs are rich in various trace elements, and the organic calcium content is six times that of ordinary eggs, and the cholesterol is extremely low, which is one third of that of ordinary eggs. Black eggs can promote children's growth and development, enhance memory, and have dietotherapy and health care effects on anorexia, food abandonment, low immunity, short stature and nutrition of pregnant women caused by zinc deficiency, cardiovascular diseases and thyroid tumors in middle-aged and elderly people. \r\n free range eggs, also known as stupid egg, earth egg and grass egg. It refers to the eggs laid by chickens that are scattered on the hillside and dig freely for food and eat insects. These chickens eat some insects, grass and leftovers. In order to make them lay more eggs, they will also be fed some food, such as corn and bran, because their food lacks many ingredients that must be added to special chicken feed, such as bone meal and hormones. Due to the above reasons, its egg white is thick and translucent, with high nutritional value. Therefore, there is no difference between earth eggs and free range eggs, but different places have different names \ r \ nTo sum up, black eggs have the highest nutritional value.