Cardinals have long been associated with the Christmas season because of their red plumage. The bright red color of the cardinal is reminiscent of the blood of Christ, which is a central theme of the holiday. Cardinals are also known for their song, which is often interpreted as a joyful expression of the season. In addition, the cardinal's red color also represents the birth of the baby Jesus, who was born in a manger surrounded by animals, including a red cardinal. Overall, the cardinal is a fitting symbol of the holiday, representing the joy, peace, and love associated with Christmas.