When will the yellow waist Liu Ying change the hair?

The yellow waist willow warbler usually changes hair in early March. During the period of hair change, you should keep it. Do not take it out to walk, and you can't put it in a place where there are winds, and feed a little more green feed, so that its feathers will become better and better.In addition, when birds are infected with skin diseases, the hair loss occurs, which is similar to changing hair, but it does not grow new hair, and the spirit of the birds is not good, and it needs to be distinguished and treated in time.