The official mammal class is Mammalia. Animals that are considered mammals include warm-blooded vertebrates that have hair or fur and whose babies drink milk. Unlike other animal types like birds and insects, all mammal babies drink milk that comes from their mother’s bodies. This is one of the key ways to know if an animal is a mammal.
The 10 Mammal Characteristics – Listed
Mammals have many other unique characteristics compared to other animal types. You can use some of these key mammal markers to identify whether an animal is a mammal:
Warm-blooded vertebrates – Mammals are endothermic, meaning they have a constant body temperature. Mammals are also vertebrates, meaning they have a backbone
Red Blood Cells Without Nucleus – Mammals have adult (mature) red blood cells, known as erythrocytes, that lack a nucleus. This is unique compared to other vertebrates.
Has hair or fur – Mammals commonly have hair, or fur. Though hair and fur are chemically similar and both made of keratin, they are characteristically different. Hair is normally longer and thinner than fur, while fur is usually shorter and coarser. Both serve as insulators for animals.
Contains a Malleus, Incus, and stapes – The Malleus is a small bone in the middle ear that is shaped like a hammer. It connects the inner surface of the eardrum with the incus. Given it’s shape, the name is derived from the latin word for ‘mallet’. The incus is shaped like an anvil and serves a similar function, vibrating to transmit sound. The stapes is a stirrup shaped bone. Together they form the ‘hammer, anvil, and stirrup’, three of the smallest bones in the human body. The stapes is the actual smallest.
Able to produce milk – Mammals contain mammary glands. These glands give them the ability to produce milk to feed their offspring.
A diaphragm – Mammals have a diaphragm sitting between their heart and lungs
Hinged Lower Jaw Connected To Skull – Mammals have a hinged lower jaw that connects directly to the skull. By comparison, all over vertebrates connect through another bone known as the quadrate. This mammal articulation allows them to more easily grasp and chew food, as well as chew sideways.
Left aortic arch – In mammals, the fourth (left) pharyngeal artery is most commonly the arch of the aorta. This differs compared to other animal types. There can be rare cases where mammals have a right aortic arch variant.
Neocortex – Mammals commonly have a neocortex in their brain. This specialized region allows them to both hear and see.
Live Birth6 – Mammals are viviparous, meaning they give birth to live babies. There are three different types of mammal birth. Monotremes, marsupial, and placental mammals, discussed further below.
There are some exceptions to the mammal criteria. Whales are mammals but they are born without hair or fur as it has typically gone after the fetal stage. Yes, that means the blue whale is in fact a mammal!
Monotremes like the duck-billed platypus and echindnas are a whole category of egg-laying mammals that are the only mammals which do NOT give birth to live young. INstead, animals like the platypus and echindnas actually lay eggs.
The Three Different Types of Mammal Births
A rare and unusual category of mammal birth where the animal lays eggs. There are only five known monotremes mammals on the planet, with the platypus and echidna’s being the most well known.
Marsupial mammals give birth to their young before they are fully developed. The babies then complete their growth outside of the mother but in a ‘pouch’. Well known marsupial examples include kangaroos, opossums, and wombats.
Members of this birth group have a birth procedure containing a placenta. The presence of a placenta transfers important nutrients between the mother and offspring, helping protect the young and ensure a well developed birth. Placental births are the most common among all mammals with examples including dogs, horses, cats, and humans.
Types of Mammals
Can move 2ft of soil in just 15 seconds!
The oldest breed of cat in the world!
First bred in 17th century Germany!
First used as a shepherd and hunter!
Can drink up to 50 gallons a day
Secretes up to 4g of musk every week!
Have large rounded ears to help keep them cool!
Solitary but gathers in groups!
Also known as the painted dog!
An innate sense of direction!
Very intelligent, independent and strong-minded!
This is a great pooch for rough-housing and one-to-one.
Often used as a guard dog!
Very clean, intelligent and loyal!
The Akita Shepherd descends from a lineage of working dogs.
The Alabai’s genes indicate that this breed has been around for more than 5,000 years.
The Alaskan Husky is one of the most common sled dogs in the world
This dog’s Malamute ancestors once came to America across the Bering Strait.
They can spit up to 10 feet.
Good companion and hard-working breed!
Alpine goats are the most common type of goat used for milk, cheese, and other dairy products
Alusky dogs are known for their sledding pulling skills.
Also known as the 'Pink Dolphin'
Merry, outgoing, and eager to please!
Easygoing and people-friendly!
The American Eskimo has splendid all white fur and an upturned tail
Sweet, kind, loyal, and very loving!
The American hairless terrier comes in two varieties with one having a very short coat.
These dogs are very energetic and would be up for a game at any given point of time
Bred to be extremely friendly!
Friendly and intelligent!
The Amur leopard may be the rarest big cat on Earth!
Guards it's master's flocks!
Each adult Angora goat produces about 12 inches of mohair annually while kids have about 8 inches.
Found throughout the Southern Hemisphere!
Renew their horns every year!
Apple Head Chihuahuas are toy breed dogs with a history dating back to ancient Mexico. They are lovable, loyal, smart and courageous with a lengthy lifespan despite being the world's smallest canines.
Extremely thick winter fur!
Eats berries found in the snow!
Incredibly versatile and adaptive!
Can curl into a hard, protective ball!
Domesticated for hundreds of years!
It mainly eats mangos and coffee!
Known to eat 160 different tree-borne fruits in Thailand!
Extinct ancestor of all domesticated cattle!
The breed has its own popular Instagram page (Aussiedoodles Daily)!
Aussiedors come in black, brown, cream, yellow, and almost every imaginable color due to their parentage!
The Aussie is a strong swimmer, a good workout in nice weather.
High energy levels and active minds!
Friendly, intelligent and energetic!
The "Australian" just refers to where the breed originated
The Australian Retriever may have two different eye colors.
Sweet, faithful and affectionate!
Spirited, alert and courageous!
Found only in one complex of lakes!
Thought to be extinct until 1957!
Babirusas can stand on their back hooves to eat leaves on the lower branches of a tree.
Can travel more than four miles a day!
The camel with two humps!
Can reach speeds of 30 km/h!
Playful and energetic breed!
Markings give it camouflage!
Bandicoot Many species are endangered or extinct!
Alert, affectionate and energetic!
This dog is also known as a Bassetdor or a Basset Lab.
A friendly and intelligent hunting dog that loves nothing more than to spend time with its owner.
Forget the training when not rewarded!
Basset hounds have been around since the 7th century, but the bassetoodle made its first appearance in the 2000s.
Detects prey using echolocation!
The Bea-Tzu has a fast-growing coat
An excellent companion for cats!
Beagadors like to dig, so make sure your garden has a good fence around it.
Have become popular family pets!
This dog can perform a wide range of exotic and acrobatic tricks that are not expected of a dog this size.
These dogs have great sniffer abilities
Beagos are good swimmers like their Golden Retriever parent.
There are 8 different species!
Weekly brushing is mandatory!
Beaskis love to play, so get ready to go on plenty of long walks.
Builds a dam from sticks and leaves!
Highly active and intelligent dogs!
Beefalo meat is leaner and higher in protein than beef
The sheepdog is also known as the Groenendael. All four Belgian varieties have nicknames for Belgian villages.
The most numerous species of tiger!
Bergamascos are excellent problem solvers; they were bred to be independent as they work alongside their nomadic shepherd owners.
The Bernedoodle was first bred in 2003 to create a dog with a similar temperament to the Bernese Mountain Dog that would have a longer lifespan.
Very loyal, faithful and affectionate!
Bernese shepherds prefer cool climates
Gentle mannered, playful and affectionate!
Despite its small size, the alert nature and sharp bark of this canine make it a good watch dog.
A toy terrier dog and is elegant and tri-colored.
Bighorn rams can run at speeds up to 40 miles per hour when fighting for dominance.
In Australia, the chocolate bilby replaces the chocolate bunny for Easter.
Also known as the Asian Bearcat!
Also known as the Sacred Cat of Burma!
Largest mammal in North America!
Confident, calm and highly intelligent!
Black footed ferrets are the only ones native to North America.
Affectionate, gentle and even-tempered!
Originated in Texas in the mid 1800s!
The largest animal on Earth
Has an uncanny knack for problem-solving!
About double the size of a domestic cat!
Boggles at animal rescues are often mistaken for pitbulls because they have a similar facial structure.
Boglen terriers are also occasionally known as boggles.
From the northern Italian city of Bologna!
Bred to look like a black panther!
Long and heavy spiralled horns!
Shares 97% of the same DNA as humans!
Boradors make excellent police dogs and are used often on search and rescue missions.
Highly intelligent and alert breed!
Small, rough-coated breed of terrier!
Bordoodles are much quieter than other Doodles and require far less exercise.
Most Borkies inherit the signature howl of their Beagle parent.
Known to use large leaves as umbrellas!
The smallest species of elephant!
Friendly, lovable and very strong!
Stays in groups from 15 to 2,000 in number!'
Bowhead Whales can make hundreds of distinct songs they use to communicate with one another.
Boxadors are extremely smart and catch onto backyard games very quickly!
Bright, energetic and playful!
The Boxerdoodle has a strong hunting dog lineage.
Boxers were bred to be working war dogs, and their boxsky descendants still love to help out on ranches and other outdoor jobs.
Boxweilers come in a variety of colors, but they usually feature the subtle brindle pattern that their boxer parents are so famous for.
Enthusiastic working dog!
Small body and tri-coloured coat!
The breed was formerly known as the Brittany spaniel
A dominant predator in it's environment!
The Brussels Griffon prefers to live with another dog so they have a companion to play with.
Has no real natural predators!
Unpredictable and aggressive temperament!
Friendly, loving and docile!
Courageous, loyal and calm!
Adoring, elegant and affectionate!
In a series of leaps, this creature can cover almost 30 feet of distance in just a few seconds.
Intelligent, lively and strong!
Can survive without water for 10 months!
Has a strong survival instinct!
They have natural snowshoes
Canadian horses are believed to generate more power per pound of body weight than any other horse breed in the world.
Cane Corsos nearly became extinct in the mid 1900’s, but the breed was revived by a group of Italians. Even so, they still didn’t become known in many other parts of the world until after 1988.
Excellent at both diving and swimming
Has 20 different muscles in it's ears!
Wild dog breed discovered in the 1970s!
Cashmere goat are named after Kashmir regions of India and Pakistan
First domesticated by the Ancient Egyptians!
The Cavador is a good service dog.
Highly playful and affectionate!
The temperament of a Cavapoo allows this breed to make an excellent family dog as well as a great therapy dog.
An affectionate hunting dog!
This breed is also known as the Bohemian Terrier (Bohemia was an historical Medieval kingdom and a region of the modern Czech Republic)
There are more than 160 different species!
Natively found in the European mountains!
Some Cheagles have an excellent sense of smell.
The fastest land mammal in the world!
Bright and happy disposition!
Curious and devoted personality!
Has 32 teeth including fang-like canines!
Natively found in the Andes Mountain range!
These dogs have a blue and black tongue.
A calm and friendly breed!
There are 25 different species!
The Chipoo was first bred in the 1970s
Chorkies are very fond of their owners and will love to sit in their laps for long amounts of time!
Loyal and affectionate to it's family!
The Chow Shepherd is also known as the Sheprachow.
Has canines that can be two inches long!
Found in dense forests and wet jungles!
Cockapoos became popular in the 1960s as a sweet, family dog.
Form bands of up to 12 individuals!
Most active in wet weather!
Corgidors are herding dogs that typically help out on cattle farms.
These dogs are highly intelligent and are easy to train.
One of the Corkie’s parent breeds, the Cocker Spaniel, was thought to have come over on the Mayflower.
Corman Shepherds can be great watchdogs and are often very protective of their owners.
Found in tropical forest edges!
Largest feline in North America
There are nearly 1.5 million worldwide!
Also known as the Prairie Wolf!
Found throughout the South-East Asian jungles!
A lively and fun-loving breed!
Has a long, strong prehensile tail!
This hybrid dog is also known as a Doxador or a Weinerdor.
Fun and playful breed of small dog!
Dalmatians were originally bred to run alongside carriages, and their dalmadoodle descendents have the same long legs and high energy.
Dalmador breeding skyrocketed after the 16 release of the live-action 101 Dalmatians movie.
Have an energetic and playful nature!
A Dapple Dachshund’s dappling pattern may be just one spot, or it may be numerous spots and splashes on their coat.
There are around 40 different species!
The Chihuahua is the smallest dog breed in the world.
Has long drop ears and a long narrow tail!
Only 2,000 left in the wild!
Natively found on the Australian continent!
A gentle, loyal and loving breed!
First domesticated in South-East Asia!
Loyal and affectionate to their family!
Extremely loyal and devoted to it's master!
Can reach speeds of up to 25 mph!
First domesticated 5,000 years ago!
Dorkies are so laid-back they sometimes need extra incentive to exercise each day.
Found in Europe, Africa and Asia!
Doxiepoos are an unpredictable breed that can come in a variety of appearances and sizes.
Doxles have long floppy ears
Uncommon outside of Europe!
Closely related to the Manatee!
A friendly and relaxed dog!
Communicates using whistles, squeaks and clicks!
The largest primate in the world!
Less than 5,000 in the wild!
Also known as the Spiny Anteater!
An ancient breed of domestic cat!
Spends around 22 hours a day eating!
The largest species of seal in the world!
Found exclusively on the African continent!
Adult males can jump eight feet vertically
Has an elegant white moustache!
Intelligent yet stubborn by nature!
Although their coats can get incredibly light in color, golden retrievers never have purely white coats.
Highly intelligent and independent!
Friendly and eager to please!
Native to parts of the Swiss Alps!
Hard-working, gentle and affectionate!
A very bold and ferocious predator!
Takes pure delight in cold weather!
Eskipoos are called pookimos by the American Canine Hybrid Club, Designer Dogs Kennel Club, and Designer Breed Registry.
Very protective and stubborn!
The fallow deer has more variation in its coat colors than most other deer.
The false killer whale looks like a cross between a dolphin and orca!
The word feisty derived from this type of dog.
Found in the African Sahara Desert!
Ferrets can be trained to do tricks like dogs!
A sociable and adaptable breed!
Found throughout ocean waters worldwide!
The fisher is an agile climber and makes its home in tree hollows
Scoops fish out of the water using it's paw!
A game retrieving gun-dog!
Florida panthers can leap more than 4.5 meters (15 feet) in the air.
The second pair of upper incisors in a flying lemur has a double root, which is unique for mammals.
Can glide up to 90 meters!
Most closely related to the Mongoose!
There are 12 different species in the world!
First bred in the mid-19th century!
French bulldogs are known to be very sensitive, harboring emotions that they love to express
Frengles have a haunting howl very similar to their Beagle parent.
Among the largest bats in the world
Found only in the Northern Hemisphere!
Has distinctive V shape on head!
German Shepherds, Siberian Huskies, and Gerberian Shepskies are all popular choices for police dogs.
Originally known as the Desert Rat!
Highly intelligent and fast learners!
Highly active and fearless dogs!
The German Sheppit is well-suited for guarding and police work.
There is a chance that the German Sheprador may inherit a love for water from its parent.
There are five different sub-breeds of the German Spitz.
Armadillos have a smell that’s described as strong, sweet and acrid.
Bamboo makes up 99 per cent of their diet!
Large, powerful and dominant!
Both parents of the Giant Schnoodle are hypoallergenic, making this one of the Doodle breeds that's safest for dander-sensitive owners.
Found in dense jungles and tropical forests!
Long, black tongue can grow to 18 inches long!
Glechons are talented in the area of search and rescue, as their sense of smell makes them great at tracking.
This dog is also named the Wicklow Terrier after the county of its origin.
Most closely related to the Sheep!
These dogs are great around children and are very playful around them.
Goldadors were not intentionally bred until the early 2000s!
Golden doxes don't have to be tiny. This breed looks different depending on whether the mix includes a regular dachshund or the mini version of the species.
Native to the eastern rainforests of Brazil!
These dogs love to swim and instinctively know how to swim.
Golden Pyrenees make great therapy dogs due to their intelligence and gentle nature.
Trusting, kind and gentle!
Golden saints come in all kinds of colors. You can find them in tan, chocolate, yellow, brindled, spotted, and almost any other pattern you can think of.
The Golden Shepherds were first recognized by the International Designer Canine Registry in 2009.
They eat figs almost exclusively
Due to their breeding, no two Goldendoodles are alike.
They dig large networks of tunnels!
The biggest of the world's primates!
The grasshopper mice attack predators using the poison of their venom.
The gray fox has retractable claws and a rotating wrist that allow it to climb trees with some proficiency
Large and imposing in appearance!
Both Great Danes and Poodles are in the top 15 most popular AKC breeds - which makes Great Danoodles a shoo-in for popularity.
Protective and gentle by nature!
Strong and speedy breed of dog!
The largest species of mouse lemur!
One of the rarest species of seal on Earth
Extremely fast and athletic!
Griffonshires are so little they are easily mistaken for puppies throughout their lives.
Less than 10% make it into adulthood
Natively found in the Andes Mountain range!
Able to run as quickly backwards as forwards!
Harbor seals can dive as deep as 1400 feet
Can reach speeds of over 40 mph!
The harp seal can migrate up to 3,000 miles every year
Cheerful, tolerant and sweet-tempered!
These are the only dogs that are native to Cuba
The exact appearance of a Havapoo can vary based on whether the genes of its Poodle or Havanese parent are more dominant.
Both of the Havashire’s parent breeds were very popular among the upper classes.
Thought to be one of the oldest mammals on Earth!
Natively found in the Scottish Highlands!
Also known as the Colourpoint Persian!
Has pink anti-bacterial sweat!
The hoary bat travels hundreds of miles south for the winter
One of earth's bravest creatures!
Horgis have a silly side and love to be the center of attention.
Has evolved over 50 million years!
Spends 80% of it's time resting!
Thought to have orignated 200,000 years ago!
Huskadors are gaining in popularity as service dogs.
Due to the mix of genes, a Husky Jack’s coat may be a variety of colors including black, gray, white, red, sable, or mixed colors.
Huskydoodles are known for their jumping abilities!
There are four different species!
Can jump over 6 feet straight up from a standstill
Intelligent, active and engaging by nature!
Able to jump over 10 feet high
Found throughout south-east Asia!
Indian giant squirrels use their large tail to help them balance.
Natively found in parts of India and Sri Lanka!
Also known as the one-horned rhino!
Now thought to be extinct in China!
The largest species of Lemur!
Irish Doodles can be very active dogs, but they also love just hanging out with their family members in the house.
Can live for up to 16 years!
An average 300 Irish Terrier puppies are born each year in the United States.
Sweet-tempered, patient and thoughtful!
The Italian Greyhound is a miniature dog with a big motor and personality!
Intelligent, athletic and fearless!
The Jackabee has an excellent sense of smell.
Can maintain speeds of 16 km/h!
The largest feline on the American continent!
Alert, intelligent and independent!
Has cheek pouches for storing food!
The Japanese squirrel hoards its food for the winter
Japanese Terriers are also called Nippon Terriers
Only has a 25cm long horn!
Features that closely resemble a Siamese cat!
Tiny rodent with a kangaroo-like jump!
Females have a deep pouch on their front!
Merriam’s kangaroo rats literally never have to drink water
They are born black, and turn gray-blue as they age.
Kiko goats breed year-round, and they are not good at defending themselves.
Typically consumes over 200 kg of food a day!
The kinkajou is a nimble forest-dwelling mammal of Central and South America.
Spends up to 80% of the time sleeping or resting!
The kodkod is among the smallest species of cats in the entire world
If Kooikerhondjes look familiar, it’s because old Dutch masters like Rembrandt and Jan Steen liked to paint them.
The name "koolie" comes from the German mispronunciation of "collie."
Lives in herds of up to 24 individuals!
Ownership of this dog was once restricted to the Hungarian nobility
Loves to participate in activities.
Labradanes can come with both sold-color coats and the more exciting patterns that you typically see on Great Danes.
Friendly and energetic mix-breed!
Well-balanced, friendly and versatile!
These dogs have medium-sized pendant ears.
These dogs were once used by farmers to keep foxes away from herds of sheep.
Have tiny ears named “gophers” or “elves”
Does not hibernate during the bitter Arctic winter!
Natively found on the island of Madagascar!
Spends much of the time high in the trees!
There are 11 different species!
The world's most aggressive seal species!
A Lhasapoo’s coat can be curly like a poodle’s or long and silky like a Lhasa Apso’s.
The offspring of a lion and tiger parents!
Lives in small groups called prides!
The little brown bat uses echolocation to quickly navigate around its environment
Natively found in the Andes Mountain range!
Live in dens in rocks and under ledges!
Folklore says it's half cat, half raccoon!
Also known as the Oriental Civet!
Found in less-dense jungles!
Malteagles are one of the smallest beagle hybrids and love to follow their owners everywhere.
Originally bred in Europe!
Maltipoos may have one of three different coat types depending on the specific genes they inherit from their parents. These include silky, curly, or wavy.
Also known as the Sea Cow!
Fences are no match for Manchester terriers. They’re great escape artists!
Distinctively coloured noses and rumps!
Despite its name, the Maned Wolf is not actually a wolf.
The marble fox is not a naturally occurring variant; it was created through artificial selection.
Less than 2,500 left in the wild!
A marmot spends 80% of its life below ground
Found throughout Asia, India and China!
The Mastador gets its enormous size from its Mastiff parent
Courageous, calm and affectionate!
The Meagle has an incredible sense of smell.
One will stand on guard to watch for predators!
Some colonies have millions of bats
The first mini labradoodle was bred in the early 1990s - almost immediately after standard labradoodles became popular.
This dog has a very happy-go-lucky temperament.
The mink can swim up to 100 feet underwater.
There are two recognised species!
Primarily hunts and feeds on Earthworms!
Range in size from just 1 to 3 foot!
Has characteristics of two or more breeds!
There are around 260 known species!
Feeds on aquatic insects and water-spiders!
Renews it's enormous antlers every year!
A Morkie puppy can weigh as little as 4 ounces.
Mountain Feists were bred in the southern United States as a dog that could help with hunting small game.
Isolated populations found in the mountains!
Has no real natural predators!
Found on every continent on Earth!
The offspring of a horse and donkey parents!
Muskox have several physical characteristics that allow them to survive in the Arctic climate.
The muskrat can stay underwater up to 17 minutes at a time
Naked mole rats don’t get cancer
Lives and hunts in the frigid Arctic!
Roamed Asia and Europe for around 100,000 years!
Fearless and extremely protective of it's home!
Introduced by Vikings more than 1,000 years ago!
Newfypoos have a thick oily coat that can be hard to groom.
Produces a lot of milk for its small size
Fearless but not aggressive!
Short claws make them good tree climbers!
Has a long, thick double coat of fur!
Though Norwich terriers are small, they have a reputation for being feisty.
The Nubian is a relatively large, proud, and graceful dairy goat that traces its ancestry to India and Egypt.
There are less than 1,000 left in the wild!
Also known as the Painted Leopard!
Eats more than 100 different types of plant!
Intelligent, sociable and playful!
Thought to be immune to certain snake venom!
Shares 97% of its DNA with humans!
There are 13 different species worldwide
Otterhounds have webbed feet making them great swimmers!
Inhabits the jungles of the far east!
Bad eyesight, but great sense of smell
Prefers to hunt at night than during the day!
The root stock of the breed was a dog named Trump
The fastest species of primate in the world!
A Patterdale Terrier’s small body structure allows it to squeeze into fox burrows.
Peagles enjoy being the center of attention. This can make them a very entertaining breed to own.
Peekapoos were first bred in the 1950’s, making them one of the first designer dog breeds.
Thought to be over 2,000 years old!
Has webbing between its toes, aiding in swimming!
Thought to have originated in the Middle East!
A small dog with a big, lively personality.
Like their purebred parents, these dogs love the water!
Females lay between 8 and 12 eggs per clutch!
Only found in one area of Brazil!
Thought to have been domesticated in 9,000 BC!
Found in mountainous regions and rocky areas
The smallest known species of Armadillo
There are several names for this breed, including the Labrabull or the Pitador Retriever.
Most Pitskies will do best as the only pet in a home. They may become aggressive with other dogs (especially two unneutered male dogs) and could try to chase or catch small pets due to their higher prey drive.
One of the only mammals to lay eggs!
Queen Elizabeth I of England once owned several Pocket Beagles
An independent, loyal and high energy breed!
Could be extinct within the next 30 years!
Despite having shaggy hair that covers its eyes, this dog is known for its watchful gaze when guarding a herd.
Pomapoos like companionship and do not like being alone. They may do better in a home with other dogs.
Pomeagles are sweet and fun dogs that like to spend time exploring their environment.
The ancestors of the Pomeranian were sled dogs.
The howls and barks of a Pomsky can sound like singing
The Poochon was first bred in Australia.
Intelligent, alert and active!
The Poogle is one of 40 different doodle dog breeds (poodle mixes).
There are 30 different species worldwide!
Surprisingly, not a dolphin!
There are 69 species on the Australian continent!
Prairie dog “towns” can consists of hundreds of individuals
Natively found on the island of Borneo!
While pronghorns are the fastest runner of any Western Hemisphere land animal, they are not good jumpers.
Like their poodle parent, Pudelpointers love to swim in pools!
Fun and sociable, yet stubborn!
The pugapoo is the fusion of a pug and a poodle.
These dogs are active and are often patient around children.
With their incredible desire to show affection, Pugshire make great lap dogs.
Has longer back legs than front legs!
Spends more time on land than in water!
The Pygora goat is exclusively bred for their fleece, and they produce three different kinds.
Most popular as a companion pet
Pyredoodles can have a thick double coat or a thinner single coat.
The quagga is a subspecies of plains zebra.
Makes runways through the long grasses!
Found across Australia and Papua New Guinea!
There are more than 50 different species!
Known to wash their food before eating it!
The only hibernating canine!
One of the larger breeds of domestic cat!
Raggles are known for their energy and curiosity.
Omnivores that eat anything!
Rat terriers were popular with farmers before 1930 because of their ability to kill rodents.
The red fox actually has many different variations of fur, including silver and brown.
There are less than 3,000 left in the wild!
The red squirrel has one of the most impressive memories in the entire animal kingdom
Red hair on hands on feet!
Also known as the Caribou
It's horns are made from keratin!
Actually related to Elephants and Manatees!
The capybara, the world’s largest rodent, likes to be in and around bodies of water. Because of this, the Catholic Church in South America decided that it was a fish, and people were allowed to eat it during Lent and First Fridays.
Many Rottskies have one brown eye and one blue eye.
Strong, loyal and self-assured!
The Russell Terrier was bred to be a good fox hunter with a keen sense of smell
The bite of a Russian Bear Dog is stronger than a lion’s bite.
First brought to the UK in the 1800s!
Canines up to 7 inches long!
Their fur has been considered a luxury item since the Middle Ages
Large noses help filter out dust
Gentle, loyal and friendly!
These dogs have an eager-to-please attitude, making them sweet and happy pets.
Only known to science since 1992!
This hybrid dog is a great companion and doesn’t do well being left alone but is suitable for apartments or houses with backyards!
Believed to be the inspiration for unicorn myths!
This breed is nicknamed the “Diehard” because of its iron will and steely determination.
It's flippers allow it to walk on the land
Eats over 40 different marine species!
There are 30 different species worldwide!
Very endangered breed that is scion of several breeds that include one that is already extinct
Can leap more than 1 meter into the air!
Around 35 million in the English countryside!
Sheepadoodles were first bred as an experiment for use as a military dog in the Army in the 1960s, however they didn’t really gain popularity until 2007.
Some police officers with allergies use Shepadoodles as their K-9 partner
These dogs can sometimes be overly aggressive.
The Shepweiler is an excellent guard dog.
Shiba Inus are one of six native dog breeds from Japan.
Can live for up to 15 years!
Shollies are a fairly new type of crossbreed!
Originated from temple cats in Thailand!
An exceptionally agile jumper!
Is adequately warm in sub-zero temperatures!
Many husky Labs have one blue eye and one brown eye.
Also known as the Amur tiger!
Although a lack of documentation makes it unclear, the first Siberpoo was probably bred in either the 1970s or 1980s.
Silky terriers can be trained to participate in many events, including herding, agility, rally, tracking and fly ball.
The Labrador is the most popular breed in the United States and most of these dogs have blue eyes at a young age, before they turn another color.
Also known as the Polecat!
Skye terriers are the oldest terrier breed, dating back at least 400 years.
It's body temperature is between 30 - 34 degrees!
These dogs are known for their fast digging abilities.
Only found in North America!
Snorkies are known for their funny, attention-getting antics.
Unlike other big cats, snow leopards don’t roar.
Thought to have originated in the 1960s!
An adult snowshoe hare can cover ten feet in a single jump.
Active, intelligent and playful!
There are less than 20 in the wild!
The Spanador is a good swimmer.
They have long, horizontal ears.
Native to the Andes mountains of South America!
Found in the tropical jungles of South America!
The springbok has a large tuft of hair that emerges from a pouch on the back
Small rodents found in woodlands worldwide!
Lives in groups of up to 500 individuals!
Now restricted to a few parks!
Known for their loyalty to their family!
The star-nosed mole has the ability to sense both electrical fields and ground vibrations
Hunted to extinction in 17 years!
Average adults weigh about 200 grams!
The striped hyenas usually mark their territories with the help of the scent gland secretions from their anal pouch.
Can glide for over 100 feet before touching the ground
Less than 2,000 left in the wild!
Known to make mental maps of the forest!
The smallest species of rhino!
The smallest species of tiger!
The smallest species of bear in the world!
Can get used to and respond to human voice
Taco terriers are known by a variety of names, including the Chitoxy Toy and the Chiwoxy.
Inhabits an isolated mountain range in northwestern Sumatra!
Most closely related to horses and rhinos!
Each eye weighs more than their whole brain!
Exclusively found on the island of Tasmania!
The Tasmanian tiger could open its mouth almost 90 degrees.
Often just called 'Teddies' by owners
These terriers have quick minds and fast feet making them excellent for agility competitions.
Terriers were once the greatest dogs in the world.
Though they are loyal to their family, these dogs can be shy around strangers.
In their native Thailand, Thai Ridgebacks were used to hunt cobras.
Tibetan foxes are not territorial and will share a hunting ground with other mated pairs.
Originally bred in the Himalayan mountains!
Originally bred to be a companion dog in Tibetan Buddhist lamaseries.
Tibetan terriers have round, flat, “snow shoe” feet that evolved to give them traction on snowy Himalayan paths
Eye color intensifies with age!
The largest feline in the world!
The Torkie has a soft silky coat
Hunters still use the toy fox to go into a fox's den and flush the animal out.
The word poodle is derived from German, and it means to splash or puddle.
It’s the only macropod that lives in trees.
Only found on a few of New Zealand's islands!
A breed that originated in central Turkey!
Have a very short tail for their size!
Have a heat sensor on the end of their nose!
Smallest cetacean in the ocean
Rarely found more than 450m from trees!
There are roughly 30 different species!
Inhabits the freezing waters of the Arctic Circle!
Has two sets of tusks on it's face!
Has been domesticated for thousands of years!
The largest Vole species in the UK!
The smallest carnivorous mammal in the world!
This dog is also known as the Weimarpoo, the Weimaranerpoo, and the Weimaranerdoodle.
There are two distinct breeds!
The Welsh Terrier has the strength and tenacity to take on foxes and badgers.
Most commonly white in colour!
There are two sub-species!
This dog is known for cocking its head in a curious manner when listening to its owner.
Originally bred as a farm dog, the Wheaten Terrier can be very protective of its domain.
Quiet, gentle and restful dogs!
The second largest animal on the land!
None have been seen in the wild for 50 years!
One of the world's most intelligent monkeys!
White-tail deer are good swimmers
Whoodles are good swimmers
Males have a top tusk to sharpen the bottom one!
Can trek more than 1,000 miles every year!
The Wire Fox Terrier was bred from the now extinct Rough Coated Black and Tan Terrier to hunt down foxes.
Thought to date back more than 300,000 years!
Releases a strong smelling musk in defence!
Spends most of the day underground!
The reintroduction of wood bison into Alaska is considered one of the world’s best conservation success stories.
Has a long, strong prehensile tail!
Squirrel that lives in burrows in Africa.
There are only a few left in the wild!
The Yakute people were likely the first to use dogs to pull sleds, so the Yakutian Laika was probably among the first sled dogs.
These dogs are very intelligent and are great with children.
Yorkie Bichons can come in a wide range of colors including black, white, blonde, gray, golden, or dark brown.
The Yorkie-Poo originated from the hybrid poodle phase of the late 20th century
Highly energetic and eager for adventure!
Stripe patterns are unique to each individual!
There are around 75 different species!
The offspring of Zebra and Donkey parents!
The offspring of a Zebra and Horse parents!
List of Mammals
Mammals by Letter Lists
Jump to a filtered list of Mammals that start with a specific letter!
Mammals FAQs (Frequently Asked Questions)
What is considered a mammal?
Mammals are those animals that have some of the 10 characteristics listed above. The most notable mammal characteristics include having hair or fur, having live births, and feeding their young milk.
What animals are Mammals?
There are nearly 6,500 publicly recognized mammal species with more being discovered all the time. Popular mammal examples include cats, dogs, horses, elephants, whales, and humans.
Are whales mammals?
Yes! Whales are marine mammals. Surprisingly, they even exhibit one of the hallmark traits of mammals and even have hair. Though, whales mostly have hair in the womb and it is mostly gone at or slightly after birth.
What is the largest mammal on earth?
The largest mammal on earth is the blue whale. At over 100ft in length and 350,000lbs blue whales are also the largest animal alive on earth today, as well as the largest animal that has ever lived!
What did mammals evolve from?
Mammals are believed to have evolved from reptiles during the triassic period (approximately 200 – 250 million years ago), specifically of the order Therapsida.
What is the smallest mammal?
At approximately 1.6 inches long and less than 1 ounce the smallest known mammal on earth today is the Etruscan Shrew.