List of Animals that start with I
- Ibex
- Ibis
- Ibizan Hound
- Icadyptes
- Icelandic Sheepdog
- Ichthyosaurus
- Ichthyostega
- Iguana
- Iguanodon
- IMG Boa Constrictor
- Immortal Jellyfish
- Impala
- Imperial Moth
- Inchworm
- Indian Cobra
- Indian Elephant
- Indian Giant Squirrel
- Indian Palm Squirrel
- Indian python
- Indian Rhinoceros
- Indian Star Tortoise
- Indianmeal Moth
- Indigo Snake
- Indochinese Tiger
- Indri
- Inland Taipan
- Insect
- Insects
- Io Moth
- Irish Doodle
- Irish Elk
- Irish Setter
- Irish Terrier
- Irish Water Spaniel
- Irish WolfHound
- Irukandji Jellyfish
- Italian Greyhound
- Ivory-billed woodpecker
- Ivy Bee
