I agree with the other answer!
Here's some solutions
1. Call an avian doctor or rescue shelter and tell them about the bird
2. Get a tub aware container with a cloth, nail it to the tree and put the bird in there
3. Because of how old the bird is leave it be
Just leave it where you found it. Young birds often leave the nest early and spend time on the ground until they can fly. The parents still take care of it. Do not try to feed or water it. It's illegal to take in wild life!!!
My mom found a baby bird that has fallen from it's nest we were trying to put it back but we can't find the nest so we are just gonna try to take care of it our self it has it's feathers and stuff it just can't fly yet so how would we go about taking care of him?