Answer:
John Lennon sang about being this toothy creature.
This small creature kills even the largest one.
Who is it that rows quickly with four oars but never comes out under his own roof?
It is an insect, and the first part of its name is the name of another insect. What is it?
I have wings but I'm not a bird. I'm fuzzy and buzz around flowers. I make something sweet. What am I?
You use it between your head and your toes, the more it works the thinner it grows.