Answer:
Face with a tree, skin like the sea. A great beast I am. Yet vermin frightens me.
Known for their natural tuxedos and marching.
When I'm metal or wood, I help you get home. When I'm flesh and I'm blood. In the darkness I roam.
What has a coat? Hugs you not in sympathy? Whose smile you'd rather not see? Whose stance is a terrible thing to see? Who is it that brave men run away from? Whose fingers are clawed? Whose sleep lasts for months? And who's company we shunt?
What animal always goes to sleep with his shoes on?
I hold two meanings. With one I may be broken, with the other I hold on. What am I?