Birds chirp as if involuntary, a muscle spasm, the body rejecting of a sound in the same way that one vomits, vibrating in the throat (in the veins) and sliding down the curves of the tongue, filling out the specific hollow of the mouth, and spilling out and down the lips- dripping, I would say, if it were not so much more violent to produce a sound than it is to drool. I imagine the pain it takes to produce those sounds as the pain that is caused when one's stomach turns and churns, ejecting the impurities, the poisons, into the world, leaving what is nurturing in the belly, to collect, to blossom, in a more natural way than voice.