Mark Twain, in Letters From the Earth, had a similar take to Billy's. Only he zeroed in on the housefly. Enjoy!!
Letter VI
On the third day, about noon, it was found that a fly and been left behind. The return voyage turned out to be long and difficult, on account of the lack of chart and compass, and because of the changed aspects of all coasts, the steadily rising water having submerged some of the lower landmarks and given to higher ones an unfamiliar look; but after sixteen days of earnest and faithful seeking, the fly was found at last, and received on board with hymns of praise and gratitude, the Family standing meanwhile uncovered, our of reverence for its divine origin. It was weary and worn, and had suffered somewhat from the weather, but was otherwise in good estate. Men and their families had died of hunger on barren mountain tops, but it had not lacked for food, the multitudinous corpses furnishing it in rank and rotten richness. Thus was the sacred bird providentially preserved.
Providentially. That is the word. For the fly had not been left behind by accident. No, the hand of Providence was in it. There are no accidents. All things that happen, happen for a purpose. They are foreseen from the beginning of time, they are ordained from the beginning of time. From the dawn of Creation the Lord had foreseen that Noah, being alarmed and confused by the invasion of the prodigious brevet fossils, would prematurely fly to sea unprovided with a certain invaluable disease. He would have all the other diseases, and could distribute them among the new races of men as they appeared in the world, but he would lack one of the very best -- typhoid fever; a malady which, when the circumstances are especially favorable, is able to utterly wreck a patient without killing him; for it can restore him to his feet with a long life in him, and yet deaf, dumb, blind, crippled, and idiotic. The housefly is its main disseminator, and is more competent and more calamitously effective than all the other distributors of the dreaded scourge put together. And so, by foreordination from the beginning of time, this fly was left behind to seek out a typhoid corpse and feed upon its corruptions and gaum its legs with germs and transmit them to the re-peopled world for permanent business. From that one housefly, in the ages that have since elapsed, billions of sickbeds have been stocked, billions of wrecked bodies sent tottering about the earth, and billions of cemeteries recruited with the dead.
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Wouldn't it be a hoot if Sam Clemens were alive to post on JWN?
Oh well. Between Farkel, OUTLAW & Billy the Ex I think we're pretty fortunate.
om