answer:I recommend watching for a bit longer to see if the mother eventually helps the poor little guy. If she doesn’t come to his aid within a few hours, I would take him into a veterinarian. Most clinics will take him, care for him, and release him back into the wild for free. At the very least, they will be able to assess his situation and give you advice on how to proceed. I took an injured pigeon into my local clinic last year (he had been hit by two cars, was bleeding through his eyes and was in shock…) and they took him in, gave him excellent care, and released him in a safe location. You might want to call around before you just show up with the robin though, as some places don’t treat avian issues. Thanks for helping! I’ll bet the little robin will appreciate it. :-)