Habu Snake – Venomous pit viper of Japan’s Ryukyu Islands; aggressive and nocturnal.
Haddock – North Atlantic fish with a black “thumbprint” mark, valued for white flaky meat.
Hagfish – Primitive jawless fish that produces defensive slime.
Haast’s Eagle – Extinct giant New Zealand eagle that preyed on moas.
Haikouichthys – One of Earth’s earliest known vertebrates, from the Cambrian seas.
Hainosaurus – Enormous marine reptile of the mosasaur family.
Hairy Frogfish – Fuzzy, camouflaged anglerfish that “walks” on its fins.
Hairy Woodpecker – North American black-and-white bird that drills trees for insects.
Hairy-footed Flower Bee – Solitary bee with furry legs adapted for pollen gathering.
Halibut – Huge flatfish living on cold ocean floors; prized food fish.
Hallucigenia – Bizarre Cambrian worm with spines and tentacle-like legs.
Hamburg Chicken – Elegant European chicken breed known for active foraging.
Hammerhead Shark – Shark with wide, hammer-shaped head for improved vision.
Hammerhead Worm – Flatworm with crescent head that preys on earthworms.
Hammond’s Flycatcher – Small gray songbird that snaps insects midair.
Hamster – Small burrowing rodent kept as a friendly household pet.
Harbor Porpoise – Small, shy porpoise found in coastal northern waters.
Harbor Seal – Spotted seal resting on beaches and rocky shores worldwide.
Hardhead Catfish – Coastal North American catfish with sharp fin spines.
Hare – Fast, long-eared mammal that gives birth to furred young.
Harlequin Coral Snake – Brightly banded venomous snake from the Americas.
Harlequin Rabbit – Colorful domestic rabbit with half-and-half face markings.
Harp Seal – Arctic seal with white pups and black facial “harp” pattern.
Harpy Eagle – Enormous rainforest eagle with striking feathered crest.
Harrier – Hawk-like raptor that hunts low over fields and marshes.
Harris’s Hawk – Social raptor that hunts cooperatively in family groups.
Hartebeest – Tall African antelope with oddly shaped, backward-curved horns.
Hatzegopteryx – Giant pterosaur with massive head and short neck.
Havamalt – Havanese–Maltese mix; small, affectionate companion dog.
Havanese – Cheerful, silky-coated Cuban lapdog.
Havapoo – Havanese–Poodle cross; gentle, hypoallergenic hybrid.
Havashire – Havanese–Yorkshire Terrier mix; loving and lively toy dog.
Havashu – Shih Tzu–Havanese mix with playful personality.
Hawaiian Crow – Intelligent, tool-using black bird native to Hawaii.
Hawaiian Goose (Nene) – Endemic goose of Hawaii; state bird and conservation success.
Hawaiian Monk Seal – Endangered tropical seal that basks on sandy beaches.
Hawk – Broad group of birds of prey with keen sight and curved beaks.
Hawk Moth Caterpillar – Large larva with tail “horn,” becomes a swift-flying moth.
Hedgehog – Small, spiny insectivore that curls into a ball for defense.
Helicoprion – Extinct sharklike fish with a spiral “buzz saw” jaw.
Hellbender – Giant, slimy salamander living under rocks in U.S. rivers.
Hepatic Tanager (Red Tanager) – Brick-red songbird of pine forests in the Americas.
Hermit Crab – Crustacean that lives inside empty seashells for protection.
Heron – Long-legged wading bird that spears fish with sharp bill.
Herrerasaurus – One of the earliest meat-eating dinosaurs, from Triassic South America.
Herring – Small schooling fish forming a vital link in ocean food chains.
Hercules Beetle – Massive horned beetle capable of lifting many times its weight.
Hercules Moth – One of the largest moths in the world, from Australia.
Herring Gull – Common large gull with gray wings and loud, laughing call.
Highland Cattle – Scottish breed with long horns and shaggy red hair.
Himalayan – Long-haired cat with Siamese markings and calm temperament.
Hippopotamus – Huge semi-aquatic herbivore with massive jaws and tusks.
Hippopotamus gorgops – Extinct giant hippo with elevated eye sockets for vision above water.
Hoary Bat – Frost-tipped, migratory bat found across North and South America.
Hobo Spider – Brown house-dwelling spider with fast-running legs.
Hognose Snake – Harmless snake that flattens its neck and plays dead.
Hokkaido – Japanese spitz-type working dog, brave and loyal.
Holy Cross Frog – Inflating Australian frog that puffs like a balloon when threatened.
Honduran White Bat – Tiny white bat that builds tents from banana leaves.
Honey Badger – Fearless mammal famed for strength and defiance of predators.
Honey Bee – Social insect that pollinates plants and makes honey.
Honey Buzzard – Wasp-eating raptor that raids nests with thick feathers for protection.
Hooded Oriole – Bright orange-and-black songbird nesting in palm trees.
Hooded Seal – Arctic seal whose males inflate balloon-like nasal sacs.
Hook-Nosed Sea Snake – Venomous marine snake with sharply upturned snout.
Hoopoe – Exotic bird with orange crest and long curved bill.
Horgi – Husky–Corgi mix; sturdy, social, and energetic.
Horn Shark – Small, spiny shark that rests near rocky reefs.
Hornbill – Tropical bird with large curved bill and sometimes a hollow casque.
Horned Adder – Small viper with horn-like scales above each eye.
Horned Beetle – Beetle with large horns used in male combat.
Horned Grebe – Diving waterbird with striking golden head plumes.
Horned Lizard – “Horned toad” reptile that shoots blood from its eyes in defense.
Horned Viper – Venomous desert snake with raised horns over its eyes.
Hornet – Large, social wasp with potent sting.
Horse – Strong, swift herbivore domesticated for work and riding.
Horse Mackerel – Name for several fast, schooling sea fish species.
Horsefly – Large biting fly; females feed on blood.
Horseshoe Crab – Ancient marine arthropod with blue blood used in medicine.
Houdan Chicken – French chicken with crest and beard, good for eggs and meat.
House Finch – Cheerful red-breasted songbird common in cities.
House Sparrow (English Sparrow) – Hardy, adaptable bird thriving near humans.
House Wren – Small, chatty brown bird nesting in holes or boxes.
Housefly – Common flying insect; spreads germs but vital for decomposition.
Hovasaurus – Extinct aquatic lizard from Madagascar’s Late Permian.
Hovawart – German working dog; loyal guardian and family protector.
Howler Monkey – Loud-voiced monkey whose calls echo through rainforests.
Human – Highly intelligent primate capable of speech, art, and culture.
Humboldt Penguin – Cold-climate penguin of South America’s Pacific coast.
Humboldt Squid – Large, fast-swimming squid known for flashing red lights.
Hummingbird – Tiny bird that hovers in air, feeding on nectar.
Hummingbird Hawk-Moth – Moth that mimics a hummingbird while hovering at flowers.
Humpback Whale – Large whale famous for long migrations and complex songs.
Huntaway – New Zealand sheepdog trained to herd by loud barking.
Huntsman Spider – Big, flat-bodied spider that runs swiftly across walls.
Huskador – Husky–Labrador mix; energetic and affectionate family dog.
Huskita – Husky–Akita mix; powerful, loyal, and protective.
Husky – Arctic sled dog with wolf-like appearance and high stamina.
Husky Jack – Husky–Jack Russell mix; lively and athletic.
Huskydoodle – Husky–Poodle mix; playful, intelligent, and low-shedding.
Hyaenodon – Extinct carnivorous mammal with elongated jaws and teeth.
Hyena – Powerful scavenger and predator with bone-crushing jaws.
Hyacinth Macaw – Largest parrot; vivid cobalt-blue feathers and golden eyes.