Bibliography : Ibis
| W. Geoffrey Arnott | Birds in the Ancient World from A to Z |
| Ron Baxter; Colum Hourihane, ed. | Learning from Nature: Lessons in Virtue and Vice in the Physiologus and Bestiaries |
| Janetta Rebold Benton | Medieval Menagerie: Animals in the Art of the Middle Ages |
| Anne Clark | Beasts and Bawdy |
| Michael J. Curley | Physiologus |
| Victor Henry Debidour | Le Bestiaire Sculpté du Moyen Age en France |