Male cardinals are highly territorial, they will even fight their own reflection, making a mess of windows and car mirrors. I like to listen to their loud, "Cheer, cheer, cheer" calls in the spring. Contrary to popular belief, birds do not call to greet the sunrise or because they are happy, they are saying, "You other guys stay away, this is my territory!" Or sometimes, "Are any of you pretty ladies interested in a date?" Listen to the birds on a spring morning and see how many different kinds you hear. How many can you identify?