Animals that contain I

List of Animals That Contain I

1

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.

2

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.

3

Babirusa

Babyrousa babyrussa

The deer-pig of Sulawesi — one of the most anatomically bizarre pigs in the world, with upper canine tusks that grow upward through the skin of the snout and curve back toward the skull; males carry these extraordinary recurved tusks throughout life, and in older individuals the tusks can complete a full circle; a Vulnerable species of Indonesian rainforest.

4

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.

5

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.

6

Capuchin

Cebus capucinus

A highly intelligent New World monkey from Central and South America — famous for tool use, complex social behaviour, and being one of the most cognitively advanced non-ape primates.

7

Chimpanzee

Pan troglodytes

Humanity's closest living relative — sharing 98.7% of our DNA — a great ape of African forests with sophisticated tool use, complex social politics, and documented warfare between communities.

8

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.

9

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.

10

Dik-dik

Madoqua kirkii (and related species)

The tiny antelope of African thornbush — one of the world's smallest antelopes, barely 35–45 cm at the shoulder, with enormous dark eyes, an elongated flexible snout, and a habit of zigzagging away in a characteristic stop-start dash when alarmed; dik-diks form lifelong monogamous pairs that maintain small territories together, marking boundaries with secretions from preorbital glands beside their eyes.

11

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.

12

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.

13

Echidna

Tachyglossus aculeatus

A spiny egg-laying mammal of Australia and New Guinea — one of only five surviving monotremes — that uses an electroreceptive snout to locate buried ants, termites, and earthworms without using sight or smell.

14

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.

15

Giraffe

Giraffa camelopardalis

The tallest living land animal, with an extraordinarily long neck and legs and a patchwork coat unique to each individual.

16

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.

17

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.

18

Ibex

Capra ibex

A wild mountain goat with massive curved horns that lives on near-vertical cliff faces in the European Alps, recovered from near-extinction through 19th-century conservation.

19

Iguana

Iguana iguana

A large, tree-dwelling Central American lizard with a row of dorsal spines and a long tail, herbivorous despite its dragon-like appearance, popular as both pet and (in some regions) food.

20

Jellyfish

Scyphozoa, Cubozoa, Hydrozoa, Staurozoa (classes)

A diverse group of marine cnidarians with translucent bodies and stinging tentacles — among Earth's oldest animals, with body plans essentially unchanged for 500+ million years and increasingly abundant in warming oceans.

21

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.

22

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.

23

Mandrill

Mandrillus sphinx

The world's largest monkey and the most colourful mammal — males develop electric blue and red facial colouring and a brilliantly coloured rump; despite their fearsome appearance, mandrills are omnivorous and live in enormous groups called hordes.

24

Nilgai

Boselaphus tragocamelus

The largest Asian antelope — the nilgai (or blue bull) is a horse-sized bovid with a distinctively horse-like gait and a sloping back; males are slate-blue with a white patch on the throat, white ear spots, and short conical horns; females are tawny-brown and hornless; the nilgai is the most common large wild mammal of the Indian plains, coexisting with agriculture and often raiding crops.

25

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.

26

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.

27

Pig

Sus scrofa domesticus

A highly intelligent omnivorous mammal domesticated independently in Asia and Europe — one of the world's most-eaten meats and a working model for human medicine.

28

Pika

Ochotona princeps (American pika) and related species

A small, round-eared relative of rabbits that lives on rocky mountain slopes and alpine meadows — unlike its rabbit relatives, it does not hibernate but instead spends summer frantically collecting and drying grasses and wildflowers into hay piles for winter; its distinctive high-pitched call echoes across talus slopes.

29

Pine Marten

Martes martes

A cat-sized mustelid of British and European forests — agile enough to chase squirrels through the tree canopy, the pine marten is one of Britain's rarest mammals; reintroduced to Wales and southern England, it is playing an unexpected role in reducing invasive grey squirrel populations, which flee the marten while native red squirrels learn to tolerate it.

30

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.

31

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.

32

Rabbit

Oryctolagus cuniculus (European)

A small social mammal that lives in burrows in groups of dozens — domesticated for fur, meat, and pets, with European rabbits as the iconic species but dozens of distinct rabbit species worldwide.

33

Reindeer

Rangifer tarandus

The only deer species in which both males and females grow antlers — domesticated for thousands of years by Arctic peoples for meat, milk, hide, and transport; famous in Western culture as Santa Claus's sleigh-pullers, based on real Sámi traditions of reindeer herding.

34

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.

35

Saiga

Saiga tatarica

A bizarre-looking antelope with an oversized, bulbous nose that filters dust and warms cold air on the Central Asian steppe; one of the most ancient living mammals, surviving alongside woolly mammoths, and now critically endangered after a catastrophic 2015 die-off killed 200,000 animals in three weeks.

36

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.

37

Siamang

Symphalangus syndactylus

The largest of the gibbons — a black, shaggy ape of the Malay Peninsula and Sumatra that produces one of the loudest calls of any land animal using an inflatable throat sac the size of a grapefruit; pairs bond for life and sing coordinated duets that carry through rainforest for kilometres.

38

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.

39

Squirrel

Sciurus carolinensis (Eastern grey); Sciurus vulgaris (Eurasian red); many species

A small bushy-tailed rodent of trees and parks — among the most successful suburban-adapted mammals, with hoarding behavior that accidentally plants countless trees each year.

40

Starfish

Asteroidea (class)

A radially symmetric marine invertebrate (more correctly called a sea star) with hundreds of tube feet, the ability to regenerate lost arms, and a unique digestive system that turns inside-out to feed.

41

Takin

Budorcas taxicolor

The ungainly giant of Himalayan forest — the takin looks improbable, like a goat that has been assembled from spare parts; it has the massive body of a musk ox, the Roman nose of a wildebeest, a short tail, and a yellow-gold coat; it is the national animal of Bhutan, where it is closely associated with the Divine Madman's legend; one of the larger bovids of Asia and a herd animal of dense rhododendron and bamboo forest.

42

Tapir

Tapirus spp.

A large, prehistoric-looking mammal from South America and Southeast Asia with a short prehensile trunk — one of the oldest surviving large-mammal body plans on Earth, more closely related to horses and rhinos than to pigs.

43

Tarsier

Tarsius spectrum and related Tarsius species

The primate with the largest eyes relative to body size of any mammal — a tiny nocturnal primate of Southeast Asian forests whose enormous, fixed eyes cannot move in their sockets (the animal must rotate its entire head to change direction of gaze); each eye is as large as its brain; it is the only entirely carnivorous primate, eating insects, lizards, and small birds.

44

Tasmanian Devil

Sarcophilus harrisii

The world's largest carnivorous marsupial — a stocky, jet-black scavenger and hunter from Tasmania, famous for its bone-crushing bite, spine-chilling screams, and its battle against a contagious facial tumour disease.

45

Tiger

Panthera tigris

The largest cat species, an apex predator with distinctive orange-and-black stripes, native to Asian forests, grasslands, and mangroves.

46

Uakari

Cacajao calvus

A South American monkey with a strikingly bare red face — health visible at a glance — that lives in flooded Amazonian forests and is among the most threatened primates in the Americas.

47

Vicuña

Vicugna vicugna

A wild South American camelid living high in the Andes, prized for its fine and exceptionally rare wool — once almost driven to extinction, now recovered through aggressive conservation.

48

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.

49

Wildebeest

Connochaetes taurinus

A large African bovid famous for the greatest wildlife spectacle on Earth — the annual Serengeti migration, in which over 1.5 million wildebeest cross crocodile-filled rivers in a coordinated mass movement.

50

Wolverine

Gulo gulo

The largest terrestrial member of the weasel family — a stocky, ferocious scavenger of northern forests and tundra with disproportionate strength, known to drive wolves and cougars off kills many times its own size.