English Wikipedia has a category on:
Wikipedia
Commons:Category
Commons:Category
Wikimedia Commons has more media related to:
Newest and oldest pages 
Newest pages ordered by last category link update:
  1. Appendix:Interlingue/helice
  2. Appendix:Interlingue/sanguisuc
  3. Appendix:Interlingue/mámmut
  4. Appendix:Interlingue/cunicul
  5. Appendix:Interlingue/nasicorne
  6. Appendix:Interlingue/histric
  7. Appendix:Interlingue/lutre
  8. Appendix:Interlingue/arané
  9. Appendix:Interlingue/cardul
  10. Appendix:Interlingue/rospe
Oldest pages ordered by last edit:
  1. Appendix:Interlingue/histric
  2. Appendix:Interlingue/nasicorne
  3. Appendix:Interlingue/hien
  4. Appendix:Interlingue/lucio
  5. Appendix:Interlingue/muren
  6. Appendix:Interlingue/luscinia
  7. Appendix:Interlingue/ursine
  8. Appendix:Interlingue/bovo
  9. Appendix:Interlingue/bove
  10. Appendix:Interlingue/struce

Interlingue terms for types or instances of animals.

NOTE: This is a set category. It should contain terms for animals, not merely terms related to animals. It may contain more general terms (e.g. types of animals) or more specific terms (e.g. names of specific animals), although there may be related categories specifically for these types of terms.