Bibliography : Bull
| Claudius Aelianus; A. F. Scholfield, trans. | On the Nature of Animals |
| Janetta Rebold Benton | Medieval Menagerie: Animals in the Art of the Middle Ages |
| Jean Francois Brichant | Bestiare taurin: Symbole et mythe |
| Anne Clark | Beasts and Bawdy |
| Ann Payne | Medieval Beasts |
| Beryl Rowland | Blind Beasts: Chaucer's Animal World |
| Leo Wiener | Contribution Towards a History of Arabico-Gothic Culture, Volume IV: Physiologus Studies |
