Answer:
I'm blue at day and black at night. I do contain some creatures born and died. What am I?
There's not a kingdom on the earth I haven't traveled over and over and though I know not whence my birth yet when I come you know my roar. I through the town do take my flight and through the fields and meadows green and whether it be day or night I neither am nor can be seen.
I can be thin but not fat; in your body but never on your placemat. I'm always better when I'm fresh but you'll never see me in the flesh.
I am the kind of food monkey likes and people slip on me and fall in cartoons.
I'm a precious stone in a pack of cards. What am I?
The profession of Jimi Hendrix and Eric Clapton