The next morning the nest was empty and they were gone, but not very far away. When our dog came face to face with one of them Mr. and Mrs. Robin went ballistic. Nothing happened to the babies but I really thought their parents were going to dive bomb me in addition to administering a severe scolding. I can hear them saying to their young ones "Now did you see that quadruped? That is why you want to learn how to fly NOW!"
Their squawking continued for a couple of days in various locales around us then finally died down. They must have learned to use their wings. Fly away little birdies. Fly away! ♫