I've had Bluebirds, which are incidentally HARD to catch on camera! They have babies now....and are house cleaning and hunting with great blue flutters! Can you see the one in this picture??
I have cheeky and mean little Wrens. They built a nest in my hanging plant...which is actually a relief to me because they are VERY aggressive and I don't want them pecking my Bluebirds out of their box.