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.
Male Cardinal. I saw in Nashville TN winter 2013-2014 (not my picture). My cats favorite bird to watch through the window. He gets so excited and talks to them. I doubt he'd know what to do if he ever caught one (not much danger of that since he is an indoor cat and makes so much noise talking to the birds he sees).