Aristotle’s view is that animals like frogs, toads and snakes appeared spontaneously out of mud, while rotting dung and mud gave rise to insect larvae, worms insects like glow worms, wasps and bees. Flies, moths, bugs, lice and beetles suddenly appeared out of farm manure, decaying wood, vinegar and fruit out of the higher animals, fishes and eels were believed to appear out of the mud of the lakes and decaying water plants.