Answer:
What bird can lift the heaviest weight?
This only turns over once you have travelled very far. What is it?
You get many of me, but never enough. After the last one, your life soon will snuff. You may have one of me but one day a year, When the last one is gone, your life disappears.
I pass before the sun, but make no shadow.
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.