I found a baby bird that fell out of its nest and ...

I found a baby bird that fell out of its nest and I cant reach up to the top of our building to replace it. I called for help since we do not have any rescues in the country and the girl that was on the phone was VERY informative on what I needed to do with the baby bird. She told me to leave it on the ground for momma and then went through further steps until I could get it to her. I don't want this VERY healthy baby bird to die and she assured me that if I follow the steps and get it to them ASAP it would probably be okay. Which made me feel better. If you aren't sure CALL THEM they are wonderful :)