How to determine order of object list collection from scene

I assumed this would take the objects from the scene in order listed on Hierarchy but no?? What method? I have hero1 hero2 hero3 on scene view 1st to last so I though it would set heroes[0] to hero1 heroes[1] to hero2 heroes[3] to hero3

but it adds the object to the list in a way that I do not understand

Thanks

     GameObject[] objects = GameObject.FindGameObjectsWithTag("HeroPrefab");
             foreach (GameObject tempObjects in objects)
             {
                 Vector3 ps = tempObjects.transform.position;
                 heroes.Add(tempObjects);
             }