What do you feed a baby martin that has fell from its nest?

No, do not feed it or put it back in the nest. If the mother bird does not come back to take or feed the baby bird, call or take it to a local bird sanctuary. Do not touch the bird unless in emergency or injured, the mother bird most likely will abonden the baby bird if it smells human scent on it and it will die. What ever you do, DO NOT TAKE CARE OF THE BABY BIRD YOURSELF. It is illegal and often very life threatening to the bird.