I have always admired Job, and thought I could not be so staunch in the face of such obliteration. I like the comparison of the bird to the story of Job because the story has such presence and the man has such a character, history that I feel like my mind does a run through a thousand years when processing that image. It has the power of history backing it, history of great suffering but also faith, a faith unlike any I've known, so I think that was a great choice.
I think another line or two before the final line might solidify or fortify the poem as a whole, but I do like the simplicity of it. I enjoyed reading it.