De Rariorum Animalium atque Stirpium Historia

The text gathers descriptions of uncommon animals and plants, organizing entries into sections on quadrupeds, birds, fishes, and plants. It blends the author's own observations with reports from others and classical references, offering careful morphological notes on form, coloration, dentition, and proportions, plus measurements and distinctive markings. Many entries compare specimens to familiar species, note rarity or local occurrence, and provide practical details for identification. The tone is cataloguing and observational, aiming to record unusual natural occurrences and reconcile contemporary findings with earlier authorities.