sure he'll be fine, probably back with his family right now Evian!.......I had a similiar thing with some baby blackbirds a few months ago, they were on the ground and flapping around, not able to fly!.....I was so stressed in case a cat got to them!..........I gathered them up frantically and put them back in the nest!......they then jumped out again!.........I was beside myself!.......then I read on the internet that they leave the nest and live on the ground for a few days, the parents then teach them to catch food and fly!..........I felt so silly!......they did eventually fledge!......I was in the garden all hours making sure that next doors cats didn't get them, I felt so protective!.....hope they nest elsewhere next year, they were a joy!........but so stressful!..........I hated the thoughf of them being cat food after being reared in my tree!......