The mother bird would sit on the nest everyday all day and even got brave enough to stay in the nest and let Mom take her picture.
Then one day one of the eggs hatched.
Mom and Dad were excited because Mom could put her digital camera right over the nest and take pictures and then look at the camera and see what was in the nest. They were waiting for the other babies to hatch when one day they went out to go to work and the nest was all messed up. There were no babies, no feathers, no egg shells .... nothing ... on the ground or anywhere. The couldn't figure out what happened but they guessed an owl or something might have come and gotten the baby and the eggs. I don't want to blame it on a cat because I have three cats that are friends of mine. The mother was fine. Mom saw her later. But she didn't come build a nest there again. That's my cardinal story. The End.