- Hippopotamus Biting Crocodile (Froschauer 1558)
- Hippopotamus Biting Crocodile. In Conrad Gessner, Conradi Gesneri medici Tigurini Historiae Animalium Liber IIII: qui est de Piscium & Aquatilium animantium natura, Zürich: Christoph Froschauer (printer), 1558 (Warsaw, BN), p. 494 ◼
- Hippopotamus Biting Crocodile. In Conrad Gessner, Icones Animalivm Qvadrvpedvm Viviparorvm Et Oviparorvm ..., Zürich: Christoph Froschauer (printer), 1560 (Zürich, ETH-Bibliothek), p. 82 ◼
- Hippopotamus Biting Crocodile. In Conrad Gessner, Conradi Gesneri Medici Tigvrini Historiae Animalivm Liber Primvs De quadrupedibus viuiparis... Editio secunda ..., Frankfurt am Main: Robert Cambier (printer), 1602 (Washington, DC, Smithsonian Libraries), p. 493 ◼
- Hippopotamus Biting Crocodile. In Conrad Gessner, Icones Animalivm Qvadrvpedvm Viviparorvm Et Oviparorvm ..., Heidelberg: Andreas Cambier (printer), Johann Lancelot (printer), 1606 (London, BL), p. 82
- Hippopotamus Biting Crocodile. In Conrad Gessner, Conr. Gesneri Medici Tigvrini Historiae Animalivm Liber Primvs De quadrupedibus viuiparis... Editio secunda ..., Frankfurt am Main: Robert Cambier (printer), 1620 (Poznań, Biblioteka Uniwersytecka), p. 493