THE GRASSHOPPER.
This silences the cuckoo with its song. It dies in oil and revives in vinegar. It sings in the greatest heats
THE BAT.
The more light there is the blinder this creature becomes; as those who gaze most at the sun become most dazzled.—For Vice, that cannot remain where Virtue appears.
THE PARTRIDGE.
This bird changes from the female into the male and forgets its former sex; and out of envy it steals the eggs from others and hatches them, but the young ones follow the true mother.
THE SWALLOW.
This bird gives sight to its blind young ones by means of celandine.
Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.