378. XIII. THAT THERE IS JEALOUSY ALSO WITH BEASTS AND BIRDS. That it exists with wild beasts, such as lions, tigers, bears, etc., when with their young, is well known; and also with bulls, even when there are no calves with them, and most conspicuously in cocks which fight with rivals for their hens, even to the death. The reason why these latter have such jealousy is because they are vainglorious lovers, and the glory of that kind of love does not brook an equal. That they are vainglorious lovers above every other genus and species of birds is apparent from their carriage, their nod, their gait, and their crowing. That with men, whether lovers or not, the glory of honor induces jealousy and exalts and sharpens it, has been confirmed above.