Answer:
What build its house with earthen string and ensnares its prey with a biting sting?
A white horned symbol of purity and grace.
What is that which, while it lives, constantly changes its habit, that is buried before it is dead, and whose tomb is valued wherever it is found?
What has a horn but does not honk?
What spends the day at the window, goes to the table for meals and hides at night?
You use it between your head and your toes, the more it works the thinner it grows.