Urgent: Bird hatchling identification
As you've pictured this is a fledgling that you found which has a mixture of adult feathers and immature feathers.  This indicates that it flew to your location, and a nest is nearby.  You should either attempt to find the nest, or just leave the fledgling alone and let it make its own way home as indicated in this online resource.

Fledglings are juvenile birds who have a mix of fuzzy down and adult feathers and are learning to fly. You may come across them hopping along on the ground, perching on low-hanging branches, or hiding under bushes, but as long as they’re healthy, just let them be.
Note: Fledglings are often “rescued” from their natural environment when they don’t need to be.