Animals that contain O — 71 detailed entries

Below are animals that contain the letter O anywhere in the name. Each of the 71 animals below opens to a full profile.

Table of contents 71 entries

List of Animals That Contain O

Alligator

Alligator (genus, two species)

A large freshwater reptilian predator native to the southeastern United States and a small enclave in eastern China — distinct from crocodiles in habitat, snout shape, and temperament.

Antelope

Antilopinae and Bovidae (subfamilies; not a single species)

A diverse group of fast, lightweight horned ungulates spanning over 90 species across Africa, Asia, and the Americas — many of the world's fastest land mammals.

Armadillo

Dasypus novemcinctus

A small American mammal armored in bony plates, the only mammal that gives birth to identical quadruplets and one of the few wild carriers of leprosy.

The Mexican salamander that never grows up — an aquatic salamander that retains its larval features throughout adult life (a condition called neoteny), keeping its external gills as feathery plumes; it can regenerate entire limbs, spinal cord segments, and even parts of the heart and brain; critically endangered in the wild but kept by millions as a pet.

Baboon

Papio spp.

A large, ground-dwelling Old World monkey with a distinctive dog-like muzzle, complex social hierarchies, and remarkable adaptability — found across sub-Saharan Africa and Arabia in five species.

Binturong

Arctictis binturong

The "bearcat" of Southeast Asian forests — a shaggy, long-tailed civet relative that smells strongly of popcorn (from a chemical it produces to mark territory), uses its prehensile tail to hang from branches, and is one of the only mammals that can delay its own pregnancy through embryonic diapause.

Bison

Bison bison

A massive North American ungulate that once numbered 30-60 million on the Great Plains — nearly hunted to extinction by 1900, now recovered to roughly 500,000 across managed herds, ranches, and tribal lands.

Bobcat

Lynx rufus

A medium-sized wild cat native to North America — adaptable, secretive, and surprisingly common in suburbs and rural areas, with a stub tail giving the species its name.

Buffalo

Syncerus caffer (Cape); Bubalus bubalis (water); Bison bison (American "buffalo")

A general name for several large bovines — the African Cape buffalo (one of the most dangerous animals in Africa), the Asian water buffalo (essential to rice farming), and the American "buffalo" (actually a bison).

Cassowary

Casuarius casuarius (Southern cassowary)

The world's most dangerous bird — a large, flightless ratite of the New Guinea and Australian rainforest, armed with a dagger-like inner toe claw 12 cm long; females are larger than males and leave all parental duties to the father; the brilliant blue-and-red neck wattles serve as status signals.

Chameleon

Chamaeleo chamaeleon (European chameleon); Furcifer pardalis (panther chameleon) and others

The famous colour-changing lizard — chameleons change colour not primarily for camouflage but to communicate mood, temperature regulation, and social status; they have independently rotating eyes that provide 360-degree vision, a tongue that launches at 13 km/h to catch insects, and feet designed like tongs for gripping branches.

Clouded Leopard

Neofelis nebulosa

A secretive mid-sized cat of Southeast Asian forests with extraordinarily large canine teeth relative to its skull and the ability to descend trees headfirst — its cloud-like coat pattern gives it its name.

Coati

Nasua nasua

A long-snouted, ringed-tail member of the raccoon family from Central and South America — highly social in females, solitary in males, and remarkably intelligent foragers.

Colobus Monkey

Colobus guereza (black-and-white colobus)

The striking leaf-eating monkey of African forest — the black-and-white colobus is one of Africa's most visually dramatic primates, with jet-black fur contrasting with white facial frame, a long white mantle over the shoulders, and a white-tipped tail; colobus monkeys eat mainly mature leaves that other primates avoid, relying on a specialised sacculated stomach to ferment and detoxify the leaf material.

Cow

Bos taurus

The world's most numerous large domesticated mammal — bred for milk, meat, leather, and labor across nearly every continent for over 10,000 years.

Coyote

Canis latrans

A medium-sized wild canid that has thrived as humans have transformed North America — expanding from prairie origins to colonize all 49 mainland US states, suburbs, and major cities.

Crocodile

Crocodylus (genus, multiple species)

A large semi-aquatic reptilian predator that has changed remarkably little in 200 million years — the world's most powerful biting jaw and an apex predator of tropical rivers and estuaries.

Dhole

Cuon alpinus

Asia's wild dog — a highly social, pack-hunting canid of South and Southeast Asian forests that kills prey far larger than itself through cooperative strategy; dholes can drive tigers and leopards from their kills, communicate with extraordinary calls including whistles and clucks, and their packs may number over 30 individuals.

Dingo

Canis lupus dingo

Australia's wild dog — a lean, amber-coated canid that arrived from Asia at least 3,500 years ago and now sits at the top of the mainland food chain as the continent's largest terrestrial predator.

Dolphin

Tursiops truncatus

A highly intelligent marine mammal found in oceans worldwide, famous for its sophisticated social behavior, problem-solving ability, and signature whistle communication.

Donkey

Equus africanus asinus

A patient, sure-footed working equid descended from the African wild ass — the world's primary cargo animal in mountainous and arid regions for over 5,000 years.

Fennec Fox

Vulpes zerda

The world's smallest fox — weighing just 1–2 kg, with disproportionately enormous ears that serve as radiators in the Sahara heat and as precision directional hearing for locating prey underground.

Fossa

Cryptoprocta ferox

Madagascar's apex predator — a cat-like carnivore related to mongooses that can climb trees with equal agility going up or down, hunts lemurs by leaping through the forest canopy, and is the largest carnivore native to Madagascar; despite resembling a cat, it is more closely related to civets.

Fox

Vulpes vulpes

The most widespread wild canid on Earth, an adaptable omnivore with a luxurious red coat, white-tipped tail, and a notorious reputation for cleverness.

Frog

Anura (order)

A diverse order of tailless amphibians — over 7,000 species worldwide, ranging from microscopic to football-sized, with skin that breathes, tongues that snap, and an outsized role in ecological monitoring.

Galago

Galago senegalensis (and related species)

The bush baby of African nights — small, doe-eyed primates with enormous forward-facing eyes for night vision, vast membranous ears that fold flat when resting, and extraordinary leaping ability; galagos can jump up to 2.25 metres in a single spring using powerful back legs; their plaintive cry in the African night sounds disconcertingly like a crying human infant, giving rise to the name bush baby.

Gibbon

Hylobatidae (family)

A small, tail-less Asian ape that swings through forest canopies with extraordinary grace — the smallest of the apes, monogamous, and famous for elaborate songs that echo through Southeast Asian rainforests at dawn.

Goat

Capra hircus

A small horned ruminant domesticated alongside sheep at the dawn of agriculture — kept globally for milk, meat, fiber, and as remarkable browsers in difficult terrain.

Gorilla

Gorilla beringei (eastern); Gorilla gorilla (western)

The largest living primate — gentle vegetarian forest dwellers of Central Africa, organized in family groups led by silverback males, with tragic conservation crises across all four subspecies.

Hedgehog

Erinaceus europaeus (European hedgehog)

A small spiky insectivore beloved across Europe and Asia — covered in 5,000+ defensive spines, capable of curling into an impenetrable ball, and increasingly endangered by habitat loss in the UK.

Hippopotamus

Hippopotamus amphibius

A massive, semiaquatic African mammal — the third-largest land animal after elephants and rhinos, with surprisingly close evolutionary ties to whales and a reputation as one of Africa's most dangerous animals.

Horse

Equus ferus caballus

A large hoofed mammal domesticated 5,500 years ago on the Eurasian steppe — central to human history as transport, agriculture, warfare, and sport, with hundreds of breeds adapted to specific tasks.

Kangaroo

Osphranter rufus

The largest living marsupial and Australia's emblematic animal, a powerful hopper that can clear 9 m in a single leap and travel 70 km/h across arid plains.

Kinkajou

Potos flavus

A golden, nocturnal rainforest mammal related to raccoons — it has a prehensile tail for gripping branches, an extraordinarily long tongue for extracting flower nectar (making it an important pollinator), and large dark eyes adapted for night vision; it sleeps in hollow trees by day and is one of the few carnivores that has adopted a largely frugivorous and nectarivorous diet.

Koala

Phascolarctos cinereus

A slow, eucalyptus-eating Australian marsupial with thick fur and a specialized digestive system, often called a "bear" but unrelated to true bears.

Komodo Dragon

Varanus komodoensis

The world's largest living lizard — a monitor lizard of the Indonesian islands that can reach 3 metres and 70 kg, kills large prey including deer and water buffalo with venom-laced saliva and a bacteria-laden bite, and can reproduce by parthenogenesis; its ancient lineage and isolated island habitat make it genuinely prehistoric in character.

Leopard

Panthera pardus

The most adaptable big cat — found from African savannas to Russian taiga to urban Mumbai — with rosette-spotted fur, a powerful bite, and remarkable ability to haul prey twice its weight up trees.

Lion

Panthera leo

A large social cat and the only big cat that lives in groups, the lioness does most of the hunting while the maned male defends territory and pride.

Lobster

Homarus americanus (American); Homarus gammarus (European)

A large marine crustacean — once a poor person's food in colonial New England, now an iconic luxury seafood and the foundation of major Maritime fisheries on both sides of the North Atlantic.

Maned Wolf

Chrysocyon brachyurus

The giraffe-legged wolf of South American grasslands — an unmistakable canid with improbably long legs, reddish-orange fur, a black mane, and large ears; the maned wolf is not closely related to wolves or foxes, being the sole member of its genus; it is an omnivore that eats more fruit than meat, and the wolf-apple (lobeira fruit) forms a large part of its diet.

Markhor

Capra falconeri

The national animal of Pakistan — a large wild goat of the Himalayas and Hindu Kush with spectacular spiral horns that in old males can reach 160 cm; the horns spiral outward in a tight corkscrew, unique among wild goats; the markhor lives on vertiginous cliff faces inaccessible to most predators and is revered in the region — its Farsi name means "snake eater," though it does not actually eat snakes.

Mole

Talpidae (family)

A small underground mammal with paddle-like front feet for digging — found across most of the northern hemisphere, dug-into-the-ground specialists with extraordinarily refined sense of touch and a near-permanent underground existence.

Mongoose

Herpestidae (family)

A diverse African and Asian mammal family famous for snake-fighting prowess — about 35 species ranging from solitary forest dwellers to highly social pack animals like meerkats.

Monkey

Cebus capucinus (white-faced) and several related species

A small, intelligent New World monkey famous for its tool use and dexterity, named after the brown-and-white robes of Capuchin friars and the most studied genus of monkey in cognitive research.

Moose

Alces alces

The largest living deer species — North American and Eurasian, browsing on aquatic plants and tree bark, capable of being unexpectedly aggressive and outweighing most cars they collide with.

Mouse

Mus musculus (house mouse)

One of the most successful mammals on Earth — house mice have followed humans worldwide, while wild mice species number in the dozens, serving as both pest, prey, and the most-used laboratory animal in modern biology.

Musk Ox

Ovibos moschatus

A massive Ice Age survivor of the Arctic tundra — famous for the defensive circle it forms against wolves, its extraordinarily warm qiviut wool, and the musky odour males produce during rut.

Octopus

Octopoda (order — many species)

An eight-limbed marine cephalopod with three hearts, blue blood, and an extraordinary intelligence — capable of solving puzzles, using tools, and changing color across its entire body in milliseconds despite being colorblind.

Okapi

Okapia johnstoni

A secretive forest giraffe of the Congo Basin — the only living relative of the giraffe, despite looking more like a striped horse, and completely unknown to Western science until 1901.

Onager

Equus hemionus

The wild ass of Asia — a fast, slender-legged equid midway between a horse and a donkey, the onager is built for speed across open desert steppe; in short sprints it can reach 70 km/h, making it one of the fastest land animals; populations have been severely reduced by hunting and habitat loss across most of their historical range; the Indian wild ass subspecies survives mainly in the Little Rann of Kutch.

Opossum

Didelphis virginiana

North America's only marsupial — a Virginia-opossum surviving and thriving across most of the continent, with a prehensile tail, 50 teeth, and the famous "playing dead" defense.

Orangutan

Pongo pygmaeus (Bornean); P. abelii (Sumatran); P. tapanuliensis (Tapanuli)

A large reddish-orange great ape of Southeast Asian rainforests — the only great ape outside Africa, exclusively arboreal, with deep cognitive abilities and a critical conservation crisis.

Otter

Enhydra lutris

A marine mustelid that floats on its back and uses stones as tools to crack shellfish, with the densest fur of any mammal and a key role in kelp-forest ecology.

Pangolin

Manis spp. / Phataginus spp. / Smutsia spp.

A scaly nocturnal mammal that looks like an animated artichoke — the world's most heavily trafficked wild mammal, with all eight species under severe poaching pressure for traditional medicine markets.

Porcupine

Erethizon dorsatum (North American); Hystrix cristata (African)

A medium-large rodent armed with up to 30,000 barbed quills — solitary, slow-moving, and surprisingly difficult to predate due to a defense that has stopped lions, leopards, and pumas.

Proboscis Monkey

Nasalis larvatus

The monkey with the most extraordinary nose in the animal kingdom — the male's enormous, pendulous nose can grow longer than 10 cm, acts as a resonating chamber to amplify calls, and appears to be a signal of genetic fitness to females; found only in the rainforests and mangroves of Borneo.

Quokka

Setonix brachyurus

A small, herbivorous Australian marsupial nicknamed the "world's happiest animal" for its perpetually grinning face, found only on Rottnest Island and in small mainland populations.

Quoll

Dasyurus maculatus

A spotted carnivorous marsupial from Australia and New Guinea — a fierce predator relative to its size, critically threatened by foxes, cats, and cane toads, and one of Australia's most important native predators.

Raccoon

Procyon lotor

A masked, dexterous-pawed nocturnal mammal of North American forests and cities — exceptionally intelligent, omnivorous, and notorious for cracking open garbage cans and pet food containers.

Rhinoceros

Ceratotherium simum

The second-largest land animal after the elephant, a massive grazing rhino with a square mouth and two horns, recovered from the brink of extinction but still poached for those horns.

Sea Lion

Zalophus californianus (California); Otariidae family

An eared seal — distinguishable from true seals by external ear flaps and front-flipper-driven swimming — with vocal "barking" colonies on rocky coasts and a long history of training for circuses, naval programs, and aquariums.

Sloth

Bradypus variegatus (brown-throated sloth)

A slow-moving, tree-hanging mammal native to Central and South American rainforests, so sluggish that algae grows on its fur — providing camouflage and a small ecosystem.

Sloth Bear

Melursus ursinus

A shaggy, long-snouted bear of the Indian subcontinent — specialised as a termite and ant eater, with long curved claws for tearing open mounds, a mobile lower lip and long tongue for extracting insects, and the ability to close its nostrils to keep out dust; the sloth bear's noisy sucking sounds as it vacuums up termites can be heard from 100 metres away.

Snow Leopard

Panthera uncia

The ghost of the mountains — a large cat of the high Himalayas and Central Asian ranges, rarely seen by humans; it has the longest tail relative to body size of any cat, which it wraps around itself like a scarf for warmth, and is known for its haunting, otherworldly call that sounds nothing like a roar.

Springbok

Antidorcas marsupialis

South Africa's national animal and emblem — a graceful medium-sized antelope of the Karoo and Kalahari known for its spectacular "pronking" display, in which it springs repeatedly into the air with arched back and stiff legs; once migrated in herds of millions across southern Africa.

Stoat

Mustela erminea

A small, fierce mustelid — an elongated, chestnut-brown predator with a cream underside and a black-tipped tail; stoats are specialist rabbit hunters, able to pursue prey much larger than themselves, and can send entire rabbit warrens into paralysed panic; in northern Britain and at altitude, they turn pure white (ermine) in winter, retaining only the black tail-tip.

Tree Kangaroo

Dendrolagus species

A kangaroo that climbs trees — tree kangaroos are macropods that returned to an arboreal life from terrestrial ancestors, re-evolving the short, curved claws, flexible forelimbs, and long counterbalancing tail needed for life in the forest canopy; they are slow and clumsy on the ground but agile in trees, able to leap between branches and drop 18 metres to the forest floor without injury.

Wild Boar

Sus scrofa

The ancestor of the domestic pig — a powerfully built, tusked omnivore with coarse grey-black bristles that has recolonised much of Europe and Asia; a major game animal, agricultural pest, and ecological engineer whose rooting transforms forest floors.

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