I house the feathered, yet I am not the sky, Where singers and gliders safely gather high. A roof of wire or glass, a domain of song, Name my six letters, where do the warblers belong?

A six letter word for a six legged creature, seems fitting. It's a very broad classification of type of animal, but a lot of people fear them. Many of them either fly or crawl, some can do both. Also, they bite.

I have been burning for billions of years, yet nobody calls me a fire hazard.

What walks on four legs in the morn- wait, what do you mean you've heard that one before? Have you been talking to Oedipus? Alright, smartypants, then how's this for a riddle: Who am I?

Where dust and dog-eared secrets lie, a quiet keeper up high. Wood or metal, it's no elf, holds the tales on itself.