Answer:
When I'm metal or wood, I help you get home. When I'm flesh and I'm blood. In the darkness I roam.
While I did live, I food did give, which many one did daily eat. Now being dead, you see they tread me under feet about the street.
What jumps when it walks and sits when it stands?
I am black and white with a fishy diet. I cannot fly but I'm an excellent swimmer. What am I?
This small creature kills even the largest one.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.