Answer:
Snake coiled round and round. Snake deep below the ground. Snake that's never had a head. Snake that binds but not with dread.
He has married many women, but has never been married. Who is he?
A reaction to being spooked that takes its name from waterfowl
My first is nothing but a name; my second is more small; my whole is of so little fame it has no name at all.
My first is an insect; my second is a border; my whole puts the face in a tuneful disorder.
What is so fragile that saying its name breaks it?