The cardinal is a representiave of a loved one who has passed. When you see one it means they are visiting you.They usually show up when you most need them or miss them. They also make an appearance during times of celebration as well as despair to let you know they will always be with you. Look for them, they'll appear.
For my Mama, even though she doesn't get on "That Line Thing You Do" - her favorite, favorite bird. She calls them "My Beauties." I have already told her that when either of us is gone, a Cardinal will be a sign that we, as angels are there