Awe, Robins are funny birds!
Funny bird story. I have one child who always finds sick birds, baby birds that fell out of the nest, etc. Last she week she visits and says I did it again there is a baby bird out on the sidewalk do you have an old towel...
We get the bird very young, its cool wind but not too cold overall, we warm baby bird. Try to find a nest as t is30-50' from any tree or structure. We decide it is in a tree by the garage. Momma Dove sitting on the worst nest, previous one was blew out of tree, it now looks like a little snack plate, flat no sides - no wonder it fell out. We devise a way to put an unused nest sized basket into the tree and tie down cross tie, etc so the baby won't fall out.
Momma flies off and we get up there only to find that the baby birds are 2/3rds grown doves, not a baby bird the size of 2 fingers!!! Then we find a different tree, correct sized birds and get it into the nest! OMGG!