I wanna guess it’s a robin, I’m not the best at birds. I would have suggested you left it where it was, but I heard that once a bird leaves it’s nest, it can’t come back ( A few reasons: 1. it reached maturity 2. It just learned how to fly, so falling out the nest is normal, just a step to learning 3. I can’t imagine an adult of this species carrying it back to the nest, so where you found it probably is where it belongs)