Answer:
With four oars it swims but it is always at home. Its back is like armor, tougher than chrome. What is it?
They are producers of pies and burgers and are great for tipping.
I am a rodent that people sometimes keep as pets. I love cheese and have a long tail. What am I?
Microparasite expert at sucking the blood of mammals and birds
It's black and every time it speaks it says its name.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.