(Author's Note: Part One of my entry for the #UltimateSFSD Round 4 - a poem, using one of the prompts. I chose crepuscular - and yes, I had to look it up! As you can probably tell, poetry is not my usual area of expertise...)

There was a young chappie called Dwight

Who boasted to Dawn of his might

You think that you're muscular

In fact you're crepuscular

Said Dawn, cos you come out to feed at twilight