Answer:
What jumps when it walks & sits when it stand?
The fans of the pied piper's smooth sound who are feared by elephants
A spent round or a slimy critter.
What is green, has four legs, no tail, and usually heard at night?
Black and scary, small and hairy. In the night you hear it preach, Through its noisy high pitched screech.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.