Hehe, my friend, what you said is quite interesting. There is nothing better than the budgerigar I have kept for ten years. I have also observed the budgerigar's nose. As far as my own judgment is concerned, there are several kinds of budgerigar noses I have observed, including full nose, dry nose, round head and dry feeling like malnutrition. Moreover, budgerigar's full nose is much rounder, and its shriveled nose is narrower. On the whole, I think this is related to the nutrition that birds ingest from childhood and the overall morphological characteristics of parrots. Especially some chickens in the city, with round heads, full noses and clean nostrils, are particularly pleasing. But in adulthood, their noses are basically the same, similar to those of other animals, but there are also differences. In addition, the ornamental value of budgerigars can't be used as a reference because there is no standard nose. Mainly color, big head tiger skin is modeling and personality, such as gross weight and cheeks (mask). Only animals with special requirements for their noses. In addition, you said that pigeons can tell whether they are good or bad by looking at their noses, mainly because there is a reference standard for ornamental strains. In addition, the nose of tiger skin can not only distinguish between male and female, but also judge the physiological cycle of birds, which is the expression of secretions in the body. There is also a general age judgment, which can also be judged by nose observation and bird feet. Interested in discussing with * * *.