- Hackee
- Haddock
- Hadrosaurus
- Hag-fish
- Hairstreak
- Hake
- Halcyon
- Halibut
- Halicore
- Hamadryad
- Hamadryas
- Hammerhead bird
- Hammerhead shark
- Hammerkop
- Hamster
- Hanuman-monkey
- Hapuka
- Hapuku
- Harbor-porpoise
- Harbor-seal
- Hare
- Harp-seal
- Harpy-eagle
- Harrier
- Harrier Hawk
- Hart
- Hartebeest
- Harvest mouse
- Harvestmen
- Hatchet-fish
- Hawaiian-monk seal
- Hawk
- Hector's dolphin
- Hedgehog
- Heifer
- Hellbender
- Hen
- Herald
- Hercules-beetle
- Hermit crab
- Heron
- Herring
- Heterodontosaurus
- Hind
- Hippo
- Hippopotamus
- Hoatzin
- Hochstetter's frog
- Hog
- Hogget
- Hoiho
- Hoki
- Homalocephale
- Honey-badger
- Honeybee
- Honey-creeper
- Honeyeater
- Hoopoe
- Horn-shark
- Horned-toad
- Horned-viper
- Hornbill
- Hornet
- Horse
- Horsefly
- Horseshoe bat
- Horseshoe crab
- Hound
- House-mouse
- Housefly
- Howler-monkey
- Huemul (deer)
- Huia
- Hummingbird
- Humpback whale
- Husky
- Hydatid-tapeworm
- Hydra
- Hyena
- Hylaeosaurus
- Hypacrosaurus
- Hypsilophodon
- Hyracotherium
- Hyrax
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