When will the crow change hair

The crow will start to change hair in spring and autumn.It changes twice a year. The first time is to prepare for breeding. Usually, only a part of the change. This part is also called a wedding feather. The color will be different, which will play a role in attracting the opposite sex.The second time is prepared for winter. At this time, the hair changing will be replaced, so you must pay attention to keep warm to prevent the bird from being blown by the cold wind.