Other birds were attacking it and the mama was trying to protect it. Lots of fighting going on. The bird couldnt survive on the ground where it was and if the nest was near it was very high up in a tree. No low branches at all. I took it home (I know you arent supposed to have wild birds but I couldnt just let it die). It is in a cage and I am feeding it dry cat food that I put in blender with water. My son worked ina pet shop and was given a baby crow. That was the food of choice. It thrieved on it but couldnt be released since it though my son was its mom and wouldnt fly away. We called wild life and they took it. How long before a robin can fly. It has a short tail, maybe an inch long. It is a bit smaller than a baby chicken. Fairly many feathers although not complete.