Answer:
A serpent swam in a silver urn, A golden bird did in its mouth abide, The serpent drank the water, this in turn, Killed the serpent. Then the gold bird died.
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?
I march before armies, a thousand salute me. My fall can bring victory, but no one would shoot me. The wind is my lover, one-legged am I. Name me and see me at home in the sky.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
There are several different kinds, but the one you pick doesn't do its job. What is it?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.