37 Animals That Start With R (Facts, Habitats & Photos)

Animals that start with R include a bird that makes tools, a deer where both sexes grow antlers, and the largest land arthropod on earth. Rhinos, ravens, reindeer, raccoons and rattlesnakes are all here, alongside the red panda — which belongs to its own family and is not a panda at all.

This guide covers 37 animals beginning with R, with scientific names, animal group, where each lives and what makes it distinctive.

Animals Starting With R: Complete List

Mammals

Rhinoceros

A rhino’s horn is not bone and is not attached to the skull — it is compacted keratin, the same protein as hair and fingernails, and it regrows if broken. That composition is why the traditional-medicine trade driving poaching is pharmacologically baseless: chewing a horn is chemically much like chewing your own nails. Rhinos have poor eyesight but excellent hearing and smell, and despite weighing up to 2,300 kg the white rhino can charge at 50 km/h.

Red Panda

Despite the name and the bamboo diet, the red panda is not closely related to the giant panda. It sits in its own family, Ailuridae, with no close living relatives. Like the giant panda it has a false thumb — an enlarged wrist bone — but the two evolved it independently, a striking case of convergent evolution. It uses its bushy tail as a blanket in Himalayan cold.

Reindeer

Reindeer are the only deer in which both males and females grow antlers — and because males shed theirs in early winter while females keep theirs until spring, any antlered reindeer pulling a sleigh in December is female. Their eyes change colour seasonally, from gold in summer to deep blue in winter, which improves vision in months-long Arctic darkness. Their hooves spread in summer for soft tundra and contract in winter to cut into ice.

Rat

Rats emit ultrasonic chirps when playing or being tickled that researchers interpret as laughter, and they display empathy — freeing a trapped companion before taking food, even when they could eat first. They are highly intelligent and cannot vomit, which is why rodenticides rely on the animal being unable to expel what it has swallowed.

Red Fox

The red fox has the widest natural distribution of any wild carnivore, spanning most of the northern hemisphere. It appears to use the earth’s magnetic field when hunting: foxes pounce on prey hidden under snow far more successfully when jumping roughly north-east, which suggests a magnetic rangefinder aligning the sound of the prey with a fixed direction.

Ringtail

A small relative of the raccoon from the American Southwest, able to rotate its hind feet a full 180 degrees to climb down cliffs and trees headfirst. It can also ascend narrow crevices by pressing all four feet against opposite walls. Prospectors kept them as mousers, which is why they are still sometimes called miner’s cats.

Roe Deer

Roe deer are the only hoofed animal known to use delayed implantation: they mate in summer, but the fertilised egg floats free for around five months before implanting, so the fawn is born in spring regardless. This decouples mating season from birth season entirely.

Right Whale

Named with grim practicality by whalers as the “right” whale to kill — slow-moving, coastal, rich in oil, and it floats after death rather than sinking. That combination nearly exterminated the species. The North Atlantic right whale remains one of the most endangered large whales, with a population in the low hundreds.

Birds

Raven

Ravens are among the most cognitively sophisticated non-human animals known. They manufacture and use tools, cache food and then re-hide it if they suspect they were watched, and plan for future events — selecting a tool for a task they will not perform until the next day, a capacity previously demonstrated only in great apes. They also mimic sounds, including human speech, and are known to hold grudges against specific individuals.

Robin

Two entirely unrelated birds share the name. The European robin is a small chat with an orange-red breast, famously bold around gardeners. The American robin is a large thrush, closer kin to a blackbird. Early colonists named the American bird after the familiar European one simply because it also had a red breast.

Roadrunner

Greater roadrunners reach about 32 km/h on foot — fast, though nowhere near a coyote, which comfortably outruns them. They genuinely do kill and eat rattlesnakes, working in pairs, and they are one of very few predators of that snake. To save energy on cold desert mornings they expose a patch of black skin on the back to the sun to warm up.

Ruff

The ruff has one of the most unusual mating systems of any bird: males come in three genetically distinct types. Territorial males have dark ruffs and defend display sites; satellite males have white ruffs and sneak matings on others’ territories; and a third rare type mimics females entirely to gain access. The strategy is fixed for life by a single chromosomal inversion.

Roseate Spoonbill

Its pink colour is dietary, from carotenoid pigments in the crustaceans it eats — the same mechanism that colours flamingos. It feeds by sweeping the flattened bill side to side through shallow water, snapping shut on contact rather than by sight, which lets it feed in muddy water and after dark.

Reptiles, Fish and Invertebrates

Rattlesnake

The rattle is made of interlocking keratin segments, and a new one is added at each moult — so the count reflects how often the snake has shed, not its age in years. Rattlesnakes detect warm-blooded prey through facial heat-sensing pits and can strike accurately in total darkness.

Robber Crab

Also called the coconut crab, this is the largest land arthropod alive, spanning up to a metre across the legs and weighing over 4 kg. Its claws generate among the strongest pinching forces measured in any animal, strong enough to husk a coconut. Adults drown in water, having lost functional gills, and they may live more than 60 years.

Rhinoceros Beetle

Named for the horn-like projections males use to wrestle rivals, levering opponents off branches. They are among the strongest animals relative to size, capable of shifting many times their own body weight, and they are entirely harmless — they cannot bite or sting.

Ray

Rays are flattened relatives of sharks with skeletons of cartilage, swimming by rippling or flapping their enlarged pectoral fins. Manta rays have the largest brain-to-body ratio of any fish and appear to recognise themselves in mirrors. Most species detect buried prey electrically.

Breeds and Specialist Species

Rabbit

Rabbits with scientific names like Oryctolagus cuniculus, which refers to all domesticated rabbits, are included in the taxonomy list. Cuniculus is the species’ name, and Oryctolagus is the name of the genus in this name. The genus Nesolagus, which contains the Sumatran jackrabbit Nesolagus netscheri and the Annamite jackrabbit Nesolagus timminsi, is another group of rabbits that fall under that taxonomy.It also contains the genera Poelagus, which includes the Central African rabbit Poelagus marjorita, and Pentalagus, which includes the Amami rabbit and Pentalagus furnessi. There are many more because there are more than 300 breeds, but these are some of the most significant ones that the various classification lists cover.A rabbit looks like an animal with shorter front legs and huge, splayed-out hind legs. The size of the animal’s ears varies depending on the type, and it also has enormous ears. Despite their similar appearances, hares and rabbits are not the same. When the animal is running or otherwise active, or when it lives in the desert and needs to use its ears to be comfortable, it radiates heat into the air through these ears. In order to assess where a predator could be coming from or to assure a location’s safety, they can also be turned to listen for sounds. These creatures come in a variety of sizes. When necessary, rabbit behavior entails employing this shape to steer clear of danger. This indicates that depending on the situation, the animal may have to run or remain motionless. Whatever they decide on will probably alter throughout the rabbit hunt as well, albeit it will depend on what the animal is in need of at the moment.When rabbits must flee predators, they leap over obstacles and run swiftly over the ground. If necessary, they can also be frozen in position. In certain cases, this makes the hunt unsuccessful, giving the animal an extra day off. Everything is dependent on how it is right now.

Raccoon

Procyo lotor is the raccoon’s scientific name. Greek word “procyon” loosely translates to “before the dog” or “dog-like” (it also happens to be the name of a very bright star in the constellation Canis Minor). Lotor, which roughly translates from the Latin pesuri and refers to the raccoon’s peculiar habit of soaking its food in water, is the scientific name for the species.The common or northern raccoon is the only species that most people in North America associate with the word “raccoon,” however the family also contains the South American raccoon and the Cozumel raccoon. They look alike, however, there are some small variances.One of the most well-known species of animal in North America is this one. It features a big cranium, round ears, sharp teeth, a large helmeted back (due to the size difference between the front and rear legs), and a tufted tail with ten black rings. The black markings around the eyes, which like a mask, are the most prominent symptoms (although not all raccoons have one). Uncertainty surrounds the mask’s intended use. This may aid in raccoons identifying one another. Or it might enhance a raccoon’s ability to see at night. Or perhaps it happened by chance.

Raccoon Dog

Nyctereutes procyonoides is the name given to these creatures by science. Nyctereutes procyonoides, which is Greek for “night wanderer,” The term is composed of the letters ereutes and nykt (night) (traveler). Tanuki, mongoose, neoguri, Japanese raccoon, Japanese badger, and other names for this mammal include tanuki and mongoose. The Korean term for these creatures is neoguri. The Japanese sable dog has smaller teeth and a smaller cranium than the mangut, also known as the tanuki. There are two more subspecies of Korean trees (also known as Neoguri) and Ussuri trees. The family of animals known as the Canidae includes the raccoon. There are certain mongooses or tanukis with all white fur in China and Japan. A tanuki that is entirely white is said to bring good luck, according to a saying. Unfortunately, it’s unusual to see these tanukis. 20 to 27 inches long for an adult. 13 golf balls would measure 27 inches in length if they were lined up end to end. An adult animal weighs between 9 and 20 kg. For instance, a 20 kilogramme poodle weighs around the same as two domestic medium-sized cats. A tree can weigh up to 22 kilos. Despite having weak vision, they have a keen sense of smell. Particularly while hunting at night, this aids them in finding their prey. These creatures have black rings around both eyes, black hair on the snout, and black fur in addition to their black coat. This animal resembles a raccoon thanks to its black fur mask. You now understand how it earned its name. But the raccoon is not the main topic. In actuality, the fox is its closest relative.Living in pairs or small families, this mammal is sociable. A pack is a bunch of sociable dogs. They make an effort to remain hidden, but when they sense a threat, they turn hostile.

Racer Snake

A non-venomous species with 11 subspecies, the rattlesnake, sometimes known as the eastern rattlesnake, may be found in North and Central America from southern Canada to Guatemala. Their technical name, “Coluber constrictor,” refers to how they lie on top of their prey and press down on it with their bodies, not because they compress their prey to kill it. The captured prey is subsequently consumed alive.The rattlesnake frequently bites people in response to perceived danger, despite the fact that it is non-venomous since it does not inject venom. The tail wags and kicks vigorously when cornered. You’re more likely to see a snake racing at up to 3.5 mph if it doesn’t bite.It can strike you unintentionally in its uncertainty! It appears to chase any people or animals that cross its path, which is why it is known as the “racing snake.” They are great climbers that move quickly and easily and are busy all day. Due to its hue, the rattlesnake is frequently mistaken for cotton wool, which is extremely dangerous and occasionally lethal.

Radiated Tortoise

The island of Madagascar is home to the somewhat sizable Radiated tortoise species. The radiant tortoise has more distinctive and intricate markings than, for instance, the Indian star tortoise, although having developed in surroundings that are similar to those of other tropic star tortoises. The snapping turtle, also known as the snapping turtle in Madagascar, is arguably the most attractive of all the turtle species while being severely threatened in the wild. They are popular exotic pets, which is undoubtedly one of the key factors in their extinction.Both sexes of the snapping turtle can be easily distinguished because the male’s tail is frequently noticeably longer than the female’s. The male snapping turtle is typically slightly larger than the female. The shells of radiate turtles are high-domed, dark brown or black, and are brightly coloured in yellow or orange with elaborate star patterns. The domed shell of radiant turtles has a flatter appearance than that of other star-structured turtles because they lack elevated star centres. The head, legs, and tail are all yellowish in hue, and each individual’s black mark on the head differs in size. This turtle’s look blends in with the long grasses wonderfully.

Ragamuffin

Cats known as ragamuffins have a relatively recent history and have only been distinguished from Ragdolls in the past three decades. Due to its loving nature, this breed of cat demands constant supervision, frequent grooming, and healthy nourishment. You might enjoy seeing their hues as they become older, despite the fact that they are frequently born absolutely white.The welcoming nature of the ragamuffin is possibly the most lovely quality it possesses. This breed of cat is renowned for the affectionate way in which it treats its owners, frequently following them around the house as a sign of this. Anyone who wants to unwind with their furry friend after a hard day will like them because of their calm dispositions.Despite having a lovable demeanour for adults, this breed is also exceptionally tolerant with kids who are still getting used to being around their pets. The ragamuffin cat appears content to be in your care, whether it’s playing or cuddling.Even if you like dogs, this cat might be right for you. It’s simple to teach them skills and even practise retrieving them thanks to their fun and clever character. A ragamuffin can also walk a tightrope with the correct exposure.

Ragdoll

Rags are devoted companions who like spending every other day with you. They follow you throughout your house in the hopes that you’ll notice them. This animal wants to play with you, so when you close the door, you should be prepared to see a foot attempting to get inside. Since many ragdolls prefer to sleep with their owners, having one frequently means taking up less room on your bed.Spend some time cuddling with your ragdoll. If they start to sag in your hands unexpectedly, don’t be shocked. This animal gets its name from its capacity for being slow like a rag doll.

Frequently Asked Questions

What animals start with the letter R?

Thirty-seven are covered here, including rabbit, raccoon, rat, raven, rhinoceros, reindeer, red panda, red fox, red deer, roe deer, robin, rooster, roadrunner, rhea, rook, ruff, rattlesnake, ray, reef shark, rainbow trout, river otter, ringtail, right whale, ringed seal, ribbon seal, rockhopper penguin, roseate spoonbill, rhinoceros beetle, robber crab and rove beetle, plus cat and dog breeds and the radiated tortoise.

Can you tell a rattlesnake’s age from its rattle?

No. A segment is added at every moult, and snakes moult several times a year when growing well and less often when food is scarce. Segments also break off. The count reflects moulting history, not years.

Is a red panda related to a giant panda?

No. The red panda is the only living member of the family Ailuridae and is more closely related to raccoons and weasels than to bears. Both species independently evolved a false thumb from a wrist bone to grip bamboo.

Do reindeer really have antlers at Christmas?

Only the females do. Males shed their antlers in early winter after the rut, while females keep theirs through to spring, when they use them to defend feeding craters in the snow. So any antlered reindeer in December is female.

Why is a rhino horn valuable if it is just keratin?

It is not valuable for any demonstrated medical reason. Rhino horn is compacted keratin — the same protein as hair and nails — and has no proven pharmacological effect. The trade is driven by status and traditional belief, and it is the principal threat to every rhino species.

Are ravens really intelligent?

Exceptionally. Ravens make tools, plan for events more than a day ahead, deceive rivals about food caches when they think they are being observed, and recognise individual humans. On several cognitive tests they perform comparably to great apes.

Sources

Classifications and distributions follow current taxonomic references. Snakebite first aid: emergency medicine guidance. Raven planning and tool use, and rat empathy studies: peer-reviewed animal-cognition literature. Ruff mating morphs and chromosomal inversion: evolutionary biology literature.

This article is for general information. Do not handle wild animals, and treat any venomous snakebite as a medical emergency.

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