Answer:
John Lennon sang about being this toothy creature.
In the fields a frightful thing. Watch it and you will find, it has a pitchfork in the front, and a broom back behind.
What two animals do you take to bed with you?
What can provide food before it is alive, while it is alive and after it's dead?
I am the only animal to have the same Latin and common name.
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?