Answer:
What is green, has four legs, no tail, and usually heard at night?
What goes zub zub zub
I'm a mammal that can fly and I sleep hanging upside down. What am I?
They're actually great swimmers now, but later they will become excellent hoppers.
Who is it that rows quickly with four oars but never comes out under his own roof?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.