In Christianity, the cardinal is often associated with the crucifixion of Jesus Christ. The bright red feathers of the male cardinal are said to symbolize the blood of Christ shed on the cross. Additionally, the cardinal's song is said to be a reminder of the resurrection of Jesus Christ. Other Christian traditions say the red of the male cardinal represents the suffering and sacrifice of Jesus. According to some accounts, the redbird was once brown until it watched over the crucifixion of Jesus. Its chest became permanently stained scarlet when a drop of Jesus' blood splattered unto its breast. It is also sometimes considered to be a symbol of the Holy Spirit, due to its vibrant red color and its association with the Passion of Christ.
In Native American culture, the cardinal is often seen as a symbol of good luck, love, and passion. It is also believed to be a messenger from the spirit world, and is often seen as a sign of hope and strength.
In the spiritual realm, the cardinal is often seen as a symbol of hope, faith, and joy. It is believed to bring good luck and protection, and is often seen as a reminder that there is always light at the end of the tunnel.
Ultimately, the meaning and symbolism of the cardinal bird is highly subjective and can vary greatly depending on one's personal beliefs, experiences, and cultural background.