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.
Mammal Exceptions
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
Monotremes
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
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.
Placental Mammals
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

Aardvark
Can move 2ft of soil in just 15 seconds!

Abyssinian
The oldest breed of cat in the world!

Affenpinscher
First bred in 17th century Germany!

Afghan Hound
First used as a shepherd and hunter!

African Bush Elephant
Can drink up to 50 gallons a day

African Civet
Secretes up to 4g of musk every week!

African Forest Elephant
Have large rounded ears to help keep them cool!

African Palm Civet
Solitary but gathers in groups!

African Wild Dog
Also known as the painted dog!

Ainu
An innate sense of direction!

Airedale Terrier
Very intelligent, independent and strong-minded!
Airedoodle
This is a great pooch for rough-housing and one-to-one.

Akbash
Often used as a guard dog!

Akita
Very clean, intelligent and loyal!

Alaskan Malamute
Often used as sled dogs!

Alaskan Shepherd
This dog’s Malamute ancestors once came to America across the Bering Strait.

Alpaca
They can spit up to 10 feet.

Alpine Dachsbracke
Good companion and hard-working breed!

Amazon River Dolphin (Pink Dolphin)
Also known as the 'Pink Dolphin'

American Bulldog
Can jump up to 6ft high!

American Cocker Spaniel
Merry, outgoing, and eager to please!

American Coonhound
Easygoing and people-friendly!

American Eskimo Dog
The American Eskimo has splendid all white fur and an upturned tail

American Foxhound
Sweet, kind, loyal, and very loving!

American Hairless Terrier
The American hairless terrier comes in two varieties with one having a very short coat.

American Pit Bull Terrier
These dogs are very energetic and would be up for a game at any given point of time

American Staffordshire Terrier
Bred to be extremely friendly!

American Water Spaniel
Friendly and intelligent!

Amur Leopard
The Amur leopard may be the rarest big cat on Earth!

Anatolian Shepherd Dog
Guards it's master's flocks!

Anteater
Found throughout the Southern Hemisphere!

Antelope
Renew their horns every year!

Appenzeller Dog
Herding dog by nature!

Arctic Fox
Extremely thick winter fur!

Arctic Hare
Eats berries found in the snow!

Arctic Wolf
Incredibly versatile and adaptive!

Armadillo
Can curl into a hard, protective ball!

Asian Elephant
Domesticated for hundreds of years!

Asian Palm Civet
It mainly eats mangos and coffee!

Asiatic Black Bear
Known to eat 160 different tree-borne fruits in Thailand!

Aussiedoodle
The breed has its own popular Instagram page (Aussiedoodles Daily)!

Aussiedor
Aussiedors come in black, brown, cream, yellow, and almost every imaginable color due to their parentage!

Australian Cattle Dog
High energy levels and active minds!

Australian Kelpie Dog
Friendly, intelligent and energetic!

Australian Labradoodle
The "Australian" just refers to where the breed originated

Australian Mist
First bred in the 1700s!

Australian Shepherd
Sweet, faithful and affectionate!

Australian Terrier
Spirited, alert and courageous!

Axolotl
Found only in one complex of lakes!

Aye Aye
Thought to be extinct until 1957!

Baboon
Can travel more than four miles a day!

Bactrian Camel
The camel with two humps!

Badger
Can reach speeds of 30 km/h!

Balinese
Playful and energetic breed!

Banded Palm Civet
Markings give it camouflage!

Bandicoot
Bandicoot Many species are endangered or extinct!

Basenji Dog
Alert, affectionate and energetic!

Bassador
This dog is also known as a Bassetdor or a Basset Lab.

Basset Fauve de Bretagne
A friendly and intelligent hunting dog that loves nothing more than to spend time with its owner.

Basset Hound
Forget the training when not rewarded!
Bassetoodle
Basset hounds have been around since the 7th century, but the bassetoodle made its first appearance in the 2000s.

Bat
Detects prey using echolocation!

Bavarian Mountain Hound
Calm, quiet and poised!

Beagador
Beagadors like to dig, so make sure your garden has a good fence around it.

Beagle
Have become popular family pets!

Beago
Beagos are good swimmers like their Golden Retriever parent.

Bear
There are 8 different species!

Bearded Collie
Weekly brushing is mandatory!

Beaver
Builds a dam from sticks and leaves!

Bedlington Terrier
Highly active and intelligent dogs!

Bengal Tiger
The most numerous species of tiger!

Bernedoodle
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.

Bernese Mountain Dog
Very loyal, faithful and affectionate!

Bernese Shepherd
Bernese shepherds prefer cool climates

Bichon Frise
Gentle mannered, playful and affectionate!

Bichpoo
Despite its small size, the alert nature and sharp bark of this canine make it a good watch dog.

Biewer Terrier
A toy terrier dog and is elegant and tri-colored.

Binturong
Also known as the Asian Bearcat!

Birman
Also known as the Sacred Cat of Burma!

Bison
Largest mammal in North America!

Black Rhinoceros
Horns can grow to 1.5m!

Black Russian Terrier
Confident, calm and highly intelligent!

Bloodhound
Affectionate, gentle and even-tempered!

Blue Lacy Dog
Originated in Texas in the mid 1800s!

Blue Whale
The largest animal on Earth

Bluetick Coonhound
Has an uncanny knack for problem-solving!

Bobcat
About double the size of a domestic cat!

Boglen Terrier
Boglen terriers are also occasionally known as boggles.

Bolognese Dog
From the northern Italian city of Bologna!

Bombay
Bred to look like a black panther!

Bongo
Long and heavy spiralled horns!

Bonobo
Shares 97% of the same DNA as humans!

Borador
Boradors make excellent police dogs and are used often on search and rescue missions.

Border Collie
Highly intelligent and alert breed!

Border Terrier
Small, rough-coated breed of terrier!

Bordoodle
Bordoodles are much quieter than other Doodles and require far less exercise.

Borkie
Most Borkies inherit the signature howl of their Beagle parent.

Bornean Orang-utan
Known to use large leaves as umbrellas!

Borneo Elephant
The smallest species of elephant!

Boston Terrier
Friendly, lovable and very strong!

Bottlenose Dolphin
Stays in groups from 15 to 2,000 in number!'

Bowhead Whale
Bowhead Whales can make hundreds of distinct songs they use to communicate with one another.

Boxador
Boxadors are extremely smart and catch onto backyard games very quickly!

Boxer Dog
Bright, energetic and playful!
Boxerdoodle
The Boxerdoodle has a strong hunting dog lineage.

Boykin Spaniel
Enthusiastic working dog!

Brazilian Terrier
Small body and tri-coloured coat!

Brown Bear
A dominant predator in it's environment!

Buffalo
Has no real natural predators!

Bull Shark
Unpredictable and aggressive temperament!

Bull Terrier
Needs to be kept active!

Bulldog
Friendly, loving and docile!

Bullmastiff
Courageous, loyal and calm!

Burmese
Adoring, elegant and affectionate!

Cairn Terrier
Intelligent, lively and strong!

Camel
Can survive without water for 10 months!

Canaan Dog
Has a strong survival instinct!

Capybara
Excellent at both diving and swimming

Caracal
Has 20 different muscles in it's ears!

Carolina Dog
Wild dog breed discovered in the 1970s!

Cat
First domesticated by the Ancient Egyptians!

Cavador
The Cavador is a good service dog.

Cavalier King Charles Spaniel
Highly playful and affectionate!

Cavapoo
The temperament of a Cavapoo allows this breed to make an excellent family dog as well as a great therapy dog.

Cesky Fousek
An affectionate hunting dog!

Cesky Terrier
This breed is also known as the Bohemian Terrier (Bohemia was an historical Medieval kingdom and a region of the modern Czech Republic)

Chameleon
There are more than 160 different species!

Chamois
Natively found in the European mountains!

Cheetah
The fastest land mammal in the world!

Chesapeake Bay Retriever
Bright and happy disposition!

Chihuahua
Curious and devoted personality!

Chimpanzee
Has 32 teeth including fang-like canines!

Chinchilla
Natively found in the Andes Mountain range!

Chinese Crested Dog
A hairless breed of dog!

Chinook
A calm and friendly breed!

Chipmunk
There are 25 different species!

Chipoo
The Chipoo was first bred in the 1970s

Chorkie
Chorkies are very fond of their owners and will love to sit in their laps for long amounts of time!

Chow Chow
Loyal and affectionate to it's family!

Chow Shepherd
The Chow Shepherd is also known as the Sheprachow.

Clouded Leopard
Has canines that can be two inches long!

Clumber Spaniel
Has a thick, soft coat!

Coati
Found in dense forests and wet jungles!

Cockapoo
Fun fact Cockapoos became popular in the 1960s as a sweet, family dog.

Collared Peccary
Form bands of up to 12 individuals!

Collie
Gentle and devoted!

Common Toad
Most active in wet weather!

Corgidor
Corgidors are herding dogs that typically help out on cattle farms.

Corgipoo
These dogs are highly intelligent and are easy to train.

Corkie
One of the Corkie’s parent breeds, the Cocker Spaniel, was thought to have come over on the Mayflower.

Cotton-top Tamarin
Found in tropical forest edges!

Cougar
Largest feline in North America

Cow
There are nearly 1.5 million worldwide!

Coyote
Also known as the Prairie Wolf!

Crab-Eating Macaque
Found throughout the South-East Asian jungles!

Cross River Gorilla
Less than 300 remaining!

Curly Coated Retriever
A lively and fun-loving breed!

Cuscus
Has a long, strong prehensile tail!

Dachsador
This hybrid dog is also known as a Doxador or a Weinerdor.

Dachshund
Fun and playful breed of small dog!
Dalmadoodle
Dalmatians were originally bred to run alongside carriages, and their dalmadoodle descendents have the same long legs and high energy.

Dalmador
Dalmador breeding skyrocketed after the 16 release of the live-action 101 Dalmatians movie.

Dalmatian
Have an energetic and playful nature!

Deer
There are around 40 different species!

Deutsche Bracke
Has long drop ears and a long narrow tail!

Dhole
Only 2,000 left in the wild!

Dingo
Natively found on the Australian continent!

Doberman Pinscher
A gentle, loyal and loving breed!

Dog
First domesticated in South-East Asia!

Dogo Argentino
Loyal and affectionate to their family!

Dogue De Bordeaux
Extremely loyal and devoted to it's master!

Dolphin
Can reach speeds of up to 25 mph!

Donkey
First domesticated 5,000 years ago!

Dorkie
Dorkies are so laid-back they sometimes need extra incentive to exercise each day.

Double Doodle
Exact origin unknown.

Doxiepoo
Doxiepoos are an unpredictable breed that can come in a variety of appearances and sizes.

Drever
Uncommon outside of Europe!

Dugong
Closely related to the Manatee!

Dunker
A friendly and relaxed dog!

Dusky Dolphin
Communicates using whistles, squeaks and clicks!

Eastern Gorilla
The largest primate in the world!

Eastern Lowland Gorilla
Less than 5,000 in the wild!

Echidna
Also known as the Spiny Anteater!

Egyptian Mau
An ancient breed of domestic cat!

Elephant
Spends around 22 hours a day eating!

Elephant Seal
The largest species of seal in the world!

Elephant Shrew
Found exclusively on the African continent!

Emperor Tamarin
Has an elegant white moustache!

English Cocker Spaniel
Intelligent yet stubborn by nature!

English Shepherd
Highly intelligent and independent!

English Springer Spaniel
Friendly and eager to please!

Entlebucher Mountain Dog
Native to parts of the Swiss Alps!

Epagneul Pont Audemer
Hard-working, gentle and affectionate!

Ermine
A very bold and ferocious predator!

Eskimo Dog
Takes pure delight in cold weather!

Eskipoo
Eskipoos are called pookimos by the American Canine Hybrid Club, Designer Dogs Kennel Club, and Designer Breed Registry.

Estrela Mountain Dog
Very protective and stubborn!

False Killer Whale
The false killer whale looks like a cross between a dolphin and orca!

Fennec Fox
Found in the African Sahara Desert!

Ferret
Ferrets can be trained to do tricks like dogs!

Field Spaniel
A sociable and adaptable breed!

Fin Whale
Found throughout ocean waters worldwide!

Finnish Spitz
Likes to bark a lot!

Fishing Cat
Scoops fish out of the water using it's paw!

Flat-Coated Retriever
A game retrieving gun-dog!

Flying Squirrel
Can glide up to 90 meters!

Fossa
Most closely related to the Mongoose!

Fox
There are 12 different species in the world!

Fox Terrier
First bred in the mid-19th century!

French Bulldog
French bulldogs are known to be very sensitive, harboring emotions that they love to express

Fur Seal
Found only in the Northern Hemisphere!

Geoffroys Tamarin
Has distinctive V shape on head!

Gerberian Shepsky
German Shepherds, Siberian Huskies, and Gerberian Shepskies are all popular choices for police dogs.

Gerbil
Originally known as the Desert Rat!

German Pinscher
Highly intelligent and fast learners!

German Shepherd Guide
Highly active and fearless dogs!

German Sheppit
The German Sheppit is well-suited for guarding and police work.

German Sheprador
There is a chance that the German Sheprador may inherit a love for water from its parent.

Giant Panda Bear
Bamboo makes up 99 per cent of their diet!

Giant Schnauzer
Large, powerful and dominant!

Giant Schnoodle
Both parents of the Giant Schnoodle are hypoallergenic, making this one of the Doodle breeds that's safest for dander-sensitive owners.

Gibbon
Found in dense jungles and tropical forests!

Giraffe
Long, black tongue can grow to 18 inches long!

Glen Of Imaal Terrier
This dog is also named the Wicklow Terrier after the county of its origin.

Goat
Most closely related to the Sheep!

Goldador
Goldadors were not intentionally bred until the early 2000s!

Golden Lion Tamarin
Native to the eastern rainforests of Brazil!

Golden Retriever
Trusting, kind and gentle!

Golden Shepherd
The Golden Shepherds were first recognized by the International Designer Canine Registry in 2009.

Golden-Crowned Flying Fox
They eat figs almost exclusively

Goldendoodle
Due to their breeding, no two Goldendoodles are alike.

Gopher
They dig large networks of tunnels!

Gorilla
The biggest of the world's primates!

Great Dane
Large and imposing in appearance!

Great Danoodle
Both Great Danes and Poodles are in the top 15 most popular AKC breeds - which makes Great Danoodles a shoo-in for popularity.

Greater Swiss Mountain Dog
Protective and gentle by nature!

Greenland Dog
Strong and speedy breed of dog!

Grey Mouse Lemur
The largest species of mouse lemur!

Grey Seal
One of the rarest species of seal on Earth

Greyhound
Extremely fast and athletic!

Griffonshire
Griffonshires are so little they are easily mistaken for puppies throughout their lives.

Grizzly Bear
Less than 10% make it into adulthood

Guinea Pig
Natively found in the Andes Mountain range!

Hamster
Able to run as quickly backwards as forwards!

Hare
Can reach speeds of over 40 mph!

Harrier
Cheerful, tolerant and sweet-tempered!

Havanese
These are the only dogs that are native to Cuba

Havapoo
The exact appearance of a Havapoo can vary based on whether the genes of its Poodle or Havanese parent are more dominant.

Havashire
Both of the Havashire’s parent breeds were very popular among the upper classes.

Hedgehog
Thought to be one of the oldest mammals on Earth!

Highland Cattle
Natively found in the Scottish Highlands!

Himalayan
Also known as the Colourpoint Persian!

Hippopotamus
Has pink anti-bacterial sweat!

Honduran White Bat
The bat only eats figs.

Honey Badger
One of earth's bravest creatures!

Horse
Has evolved over 50 million years!

Howler Monkey
Spends 80% of it's time resting!

Human
Thought to have orignated 200,000 years ago!

Huskador
Huskadors are gaining in popularity as service dogs.

Huskydoodle
Huskydoodles are known for their jumping abilities!

Hyena
There are four different species!

Ibis
Found in swamps, marshes and wetlands!

Ibizan Hound
Intelligent, active and engaging by nature!

Impala
Able to jump over 10 feet high

Indian Elephant
Found throughout south-east Asia!

Indian Palm Squirrel
Natively found in parts of India and Sri Lanka!

Indian Rhinoceros
Also known as the one-horned rhino!

Indochinese Tiger
Now thought to be extinct in China!

Irish Doodle
Irish Doodles can be very active dogs, but they also love just hanging out with their family members in the house.

Irish Setter
Can live for up to 16 years!

Irish Terrier
An average 300 Irish Terrier puppies are born each year in the United States.

Irish WolfHound
Sweet-tempered, patient and thoughtful!

Italian Greyhound
The Italian Greyhound is a miniature dog with a big motor and personality!

Jack Russell
Intelligent, athletic and fearless!

Jackal
Can maintain speeds of 16 km/h!

Jaguar
The largest feline on the American continent!

Japanese Chin
Alert, intelligent and independent!

Japanese Macaque
Has cheek pouches for storing food!

Japanese Terrier
Japanese Terriers are also called Nippon Terriers

Javan Rhinoceros
Only has a 25cm long horn!

Javanese
Features that closely resemble a Siamese cat!

Jerboa
Tiny rodent with a kangaroo-like jump!

Kangaroo
Females have a deep pouch on their front!

Kerry Blue Terrier
They are born black, and turn gray-blue as they age.

Killer Whale
Typically consumes over 200 kg of food a day!

Kinkajou
The kinkajou is a nimble forest-dwelling mammal of Central and South America.

Koala
Spends up to 80% of the time sleeping or resting!

Kudu
Lives in herds of up to 24 individuals!

Labmaraner
Loves to participate in activities.

Labradane
Labradanes can come with both sold-color coats and the more exciting patterns that you typically see on Great Danes.

Labradoodle
Friendly and energetic mix-breed!

Labrador Retriever
Well-balanced, friendly and versatile!

Labraheeler
These dogs have medium-sized pendant ears.

Lakeland Terrier
These dogs were once used by farmers to keep foxes away from herds of sheep.

Lemming
Does not hibernate during the bitter Arctic winter!

Lemur
Natively found on the island of Madagascar!

Leopard
Spends much of the time high in the trees!

Leopard Cat
There are 11 different species!

Leopard Seal
The world's most aggressive seal species!

Lhasapoo
A Lhasapoo’s coat can be curly like a poodle’s or long and silky like a Lhasa Apso’s.

Liger
The offspring of a lion and tiger parents!

Lion
Lives in small groups called prides!

Llama
Natively found in the Andes Mountain range!

Lynx
Live in dens in rocks and under ledges!

Maine Coon
Folklore says it's half cat, half raccoon!

Malayan Civet
Also known as the Oriental Civet!

Malayan Tiger
Found in less-dense jungles!

Maltese
Originally bred in Europe!

Maltipoo
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.

Manatee
Also known as the Sea Cow!

Manchester Terrier
Fences are no match for Manchester terriers. They’re great escape artists!

Mandrill
Distinctively coloured noses and rumps!

Maned Wolf
Despite its name, the Maned Wolf is not actually a wolf.

Markhor
Less than 2,500 left in the wild!

Marmot
A marmot spends 80% of its life below ground

Masked Palm Civet
Found throughout Asia, India and China!

Mastador
The Mastador gets its enormous size from its Mastiff parent

Mastiff
Courageous, calm and affectionate!

Meagle
The Meagle has an incredible sense of smell.

Meerkat
One will stand on guard to watch for predators!

Mexican Free-Tailed Bat
Some colonies have millions of bats

Mini Labradoodle
The first mini labradoodle was bred in the early 1990s - almost immediately after standard labradoodles became popular.

Miniature Bull Terrier
This dog has a very happy-go-lucky temperament.

Mink
The mink can swim up to 100 feet underwater.

Minke Whale
There are two recognised species!

Mole
Primarily hunts and feeds on Earthworms!

Mongoose
Range in size from just 1 to 3 foot!

Mongrel
Has characteristics of two or more breeds!

Monkey
There are around 260 known species!

Moorhen
Feeds on aquatic insects and water-spiders!

Moose
Renews it's enormous antlers every year!

Mountain Gorilla
Isolated populations found in the mountains!

Mountain Lion
Has no real natural predators!

Mouse
Found on every continent on Earth!

Mule
The offspring of a horse and donkey parents!

Muskox
Muskox have several physical characteristics that allow them to survive in the Arctic climate.

Muskrat
The muskrat can stay underwater up to 17 minutes at a time

Narwhal
Lives and hunts in the frigid Arctic!

Neanderthal
Roamed Asia and Europe for around 100,000 years!

Neapolitan Mastiff
Fearless and extremely protective of it's home!

Newfoundland
Introduced by Vikings more than 1,000 years ago!

Newfypoo
Newfypoos have a thick oily coat that can be hard to groom.

Norfolk Terrier
Fearless but not aggressive!

North American Black Bear
Short claws make them good tree climbers!

Norwegian Forest
Has a long, thick double coat of fur!

Norwich Terrier
Though Norwich terriers are small, they have a reputation for being feisty.

Numbat
There are less than 1,000 left in the wild!

Ocelot
Also known as the Painted Leopard!

Okapi
Eats more than 100 different types of plant!

Old English Sheepdog
Intelligent, sociable and playful!

Opossum
Thought to be immune to certain snake venom!

Orang-utan
Shares 97% of its DNA with humans!

Otter
There are 13 different species worldwide

Pademelon
Inhabits the jungles of the far east!

Pangolin
Bad eyesight, but great sense of smell

Panther
Prefers to hunt at night than during the day!

Parson Russell Terrier
The root stock of the breed was a dog named Trump

Patas Monkey
The fastest species of primate in the world!

Patterdale Terrier
A Patterdale Terrier’s small body structure allows it to squeeze into fox burrows.

Peekapoo
Peekapoos were first bred in the 1950’s, making them one of the first designer dog breeds.

Pekingese
Thought to be over 2,000 years old!

Pere Davids Deer
Has webbing between its toes, aiding in swimming!

Persian
Thought to have originated in the Middle East!

Petit Basset Griffon Vendéen
A small dog with a big, lively personality.

Pheasant
Females lay between 8 and 12 eggs per clutch!

Pied Tamarin
Only found in one area of Brazil!

Pig
Thought to have been domesticated in 9,000 BC!

Pika
Found in mountainous regions and rocky areas

Pink Fairy Armadillo
The smallest known species of Armadillo

Pitador
There are several names for this breed, including the Labrabull or the Pitador Retriever.

Platypus
One of the only mammals to lay eggs!

Pointer
An independent, loyal and high energy breed!

Polar Bear
Could be extinct within the next 30 years!

Pomapoo
Pomapoos like companionship and do not like being alone. They may do better in a home with other dogs.

Pomeranian
The ancestors of the Pomeranian were sled dogs.

Poochon
The Poochon was first bred in Australia.

Poodle
Intelligent, alert and active!

Poogle
Generally, miniature poodles are the dog breed used in programs for producing Poogles.

Porcupine
There are 30 different species worldwide!

Porpoise
Surprisingly, not a dolphin!

Possum
There are 69 species on the Australian continent!

Proboscis Monkey
Natively found on the island of Borneo!

Pug
Fun and sociable, yet stubborn!

Pugapoo
The pugapoo is the fusion of a pug and a poodle.

Pugshire
With their incredible desire to show affection, Pugshire make great lap dogs.

Puma
Has longer back legs than front legs!

Pygmy Hippopotamus
Spends more time on land than in water!

Pygmy Marmoset
The smallest species of monkey in the world!

Pyrador
Most popular as a companion pet

Pyredoodle
Pyredoodles can have a thick double coat or a thinner single coat.

Quokka
Makes runways through the long grasses!

Quoll
Found across Australia and Papua New Guinea!

Rabbit
There are more than 50 different species!

Raccoon
Known to wash their food before eating it!

Raccoon Dog
The only hibernating canine!

Ragdoll
One of the larger breeds of domestic cat!

Rat
Omnivores that eat anything!

Rat Terrier
Rat terriers were popular with farmers before 1930 because of their ability to kill rodents.

Red Fox
The red fox actually has many different variations of fur, including silver and brown.

Red Panda
There are less than 3,000 left in the wild!

Red Wolf
Only 100 in the wild!

Red-handed Tamarin
Red hair on hands on feet!

Reindeer
Also known as the Caribou

Rhinoceros
It's horns are made from keratin!

Rock Hyrax
Actually related to Elephants and Manatees!

Rottweiler
Strong, loyal and self-assured!

Russell Terrier
The Russell Terrier was bred to be a good fox hunter with a keen sense of smell

Russian Blue
First brought to the UK in the 1800s!

Saber-Toothed Tiger
Canines up to 7 inches long!

Sable
Their fur has been considered a luxury item since the Middle Ages

Saiga
Large noses help filter out dust

Saint Bernard
Gentle, loyal and friendly!
Saint Shepherd
These dogs have an eager-to-please attitude, making them sweet and happy pets.

Saola
Only known to science since 1992!

Scimitar-horned Oryx
Believed to be the inspiration for unicorn myths!

Scottish Terrier
This breed is nicknamed the “Diehard” because of its iron will and steely determination.

Sea Lion
It's flippers allow it to walk on the land

Sea Otter
Eats over 40 different marine species!

Seal
There are 30 different species worldwide!

Sealyham Terrier
Very endangered breed that is scion of several breeds that include one that is already extinct

Serval
Can leap more than 1 meter into the air!

Sheep
Around 35 million in the English countryside!

Sheepadoodle
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.

Shepadoodle
Some police officers with allergies use Shepadoodles as their K-9 partner
Shepkita
These dogs can sometimes be overly aggressive.

Shiba Inu
Shiba Inus are one of six native dog breeds from Japan.

Shih Tzu
Can live for up to 15 years!

Siamese
Originated from temple cats in Thailand!

Siberian
An exceptionally agile jumper!

Siberian Husky
Is adequately warm in sub-zero temperatures!

Siberian Tiger
Also known as the Amur tiger!
Siberpoo
Although a lack of documentation makes it unclear, the first Siberpoo was probably bred in either the 1970s or 1980s.

Silky Terrier
Silky terriers can be trained to participate in many events, including herding, agility, rally, tracking and fly ball.

Skunk
Also known as the Polecat!

Skye Terrier
Skye terriers are the oldest terrier breed, dating back at least 400 years.

Sloth
It's body temperature is between 30 - 34 degrees!

Smooth Fox Terrier
These dogs are known for their fast digging abilities.

Snapping Turtle
Only found in North America!

Snowshoe
Thought to have originated in the 1960s!

Snowshoe Hare
An adult snowshoe hare can cover ten feet in a single jump.

Somali
Active, intelligent and playful!

South China Tiger
There are less than 20 in the wild!

Spanador
The Spanador is a good swimmer.

Spectacled Bear
Native to the Andes mountains of South America!

Sperm Whale
Each tooth weighs 1kg!

Spider Monkey
Found in the tropical jungles of South America!

Squirrel
Small rodents found in woodlands worldwide!

Squirrel Monkey
Lives in groups of up to 500 individuals!

Sri Lankan Elephant
Now restricted to a few parks!

Staffordshire Bull Terrier
Known for their loyalty to their family!

Steller’s Sea Cow
Hunted to extinction in 17 years!

Stoat
Average adults weigh about 200 grams!

Sugar Glider
Can glide for over 100 feet before touching the ground

Sumatran Elephant
Less than 2,000 left in the wild!

Sumatran Orang-utan
Known to make mental maps of the forest!

Sumatran Rhinoceros
The smallest species of rhino!

Sumatran Tiger
The smallest species of tiger!

Sun Bear
The smallest species of bear in the world!

Taco Terrier
Taco terriers are known by a variety of names, including the Chitoxy Toy and the Chiwoxy.

Tapanuli Orang-utan
Inhabits an isolated mountain range in northwestern Sumatra!

Tapir
Most closely related to horses and rhinos!

Tarsier
Each eye weighs more than their whole brain!

Tasmanian Devil
Exclusively found on the island of Tasmania!

Teddy Roosevelt Terrier
Often just called 'Teddies' by owners

Tenterfield Terrier
These terriers have quick minds and fast feet making them excellent for agility competitions.

Terrier
Terriers were once the greatest dogs in the world.

Tibetan Mastiff
Originally bred in the Himalayan mountains!

Tibetan Terrier
Tibetan terriers have round, flat, “snow shoe” feet that evolved to give them traction on snowy Himalayan paths

Tiffany
Eye colour intensifies with age!

Tiger
The largest feline in the world!

Toy Fox Terrier
Hunters still use the toy fox to go into a fox's den and flush the animal out.

Toy Poodle
The word poodle is derived from German, and it means to splash or puddle.

Tuatara
Only found on a few of New Zealand's islands!

Turkish Angora
A breed that originated in central Turkey!

Uakari
Have a very short tail for their size!

Vampire Bat
Have a heat sensor on the end of their nose!

Vaquita
Smallest cetacean in the ocean

Vervet Monkey
Rarely found more than 450m from trees!

Wallaby
There are roughly 30 different species!

Walrus
Inhabits the freezing waters of the Arctic Circle!

Warthog
Has two sets of tusks on it's face!

Water Buffalo
Has been domesticated for thousands of years!

Water Vole
The largest Vole species in the UK!

Weasel
The smallest carnivorous mammal in the world!

Weimardoodle
This dog is also known as the Weimarpoo, the Weimaranerpoo, and the Weimaranerdoodle.

Welsh Corgi
There are two distinct breeds!

Welsh Terrier
The Welsh Terrier has the strength and tenacity to take on foxes and badgers.

West Highland Terrier
Most commonly white in colour!

Western Gorilla
There are two sub-species!

Western Lowland Gorilla
One of the great apes!

Westiepoo
This dog is known for cocking its head in a curious manner when listening to its owner.

Wheaten Terrier
Originally bred as a farm dog, the Wheaten Terrier can be very protective of its domain.

Whippet
Quiet, gentle and restful dogs!

White Rhinoceros
The second largest animal on the land!

White Tiger
None have been seen in the wild for 50 years!

White-Faced Capuchin
One of the world's most intelligent monkeys!

Whoodle
Whoodles are good swimmers

Wild Boar
Males have a top tusk to sharpen the bottom one!

Wildebeest
Can trek more than 1,000 miles every year!

Wire Fox Terrier
The Wire Fox Terrier was bred from the now extinct Rough Coated Black and Tan Terrier to hunt down foxes.

Wolf
Thought to date back more than 300,000 years!

Wolverine
Releases a strong smelling musk in defence!

Wombat
Spends most of the day underground!

Woolly Mammoth
Tusks grew to 16ft long!

Woolly Monkey
Has a long, strong prehensile tail!

Xerus
Squirrel that lives in burrows in Africa.

Yak
There are only a few left in the wild!

Yorkie Poo
The Yorkie-Poo originated from the hybrid poodle phase of the late 20th century

Yorkshire Terrier
Highly energetic and eager for adventure!

Zebra
Stripe patterns are unique to each individual!

Zebu
There are around 75 different species!

Zonkey
The offspring of Zebra and Donkey parents!

Zorse
The offspring of a Zebra and Horse parents!
List of Mammals
- Aardvark
- Abyssinian
- Affenpinscher
- Afghan Hound
- African Bush Elephant
- African Civet
- African Forest Elephant
- African Palm Civet
- African Wild Dog
- Ainu
- Airedale Terrier
- Airedoodle
- Akbash
- Akita
- Alaskan Malamute
- Alaskan Shepherd
- Alpaca
- Alpine Dachsbracke
- Amazon River Dolphin (Pink Dolphin)
- American Alsatian
- American Bulldog
- American Cocker Spaniel
- American Coonhound
- American Eskimo Dog
- American Foxhound
- American Hairless Terrier
- American Pit Bull Terrier
- American Staffordshire Terrier
- American Water Spaniel
- Amur Leopard
- Anatolian Shepherd Dog
- Anteater
- Antelope
- Appenzeller Dog
- Arctic Fox
- Arctic Hare
- Arctic Wolf
- Armadillo
- Asian Elephant
- Asian Palm Civet
- Asiatic Black Bear
- Aussiedoodle
- Aussiedor
- Australian Cattle Dog
- Australian Kelpie Dog
- Australian Labradoodle
- Australian Mist
- Australian Shepherd
- Australian Terrier
- Axolotl
- Aye Aye
- Baboon
- Bactrian Camel
- Badger
- Balinese
- Banded Palm Civet
- Bandicoot
- Basenji Dog
- Bassador
- Basset Fauve de Bretagne
- Basset Hound
- Bassetoodle
- Bat
- Bavarian Mountain Hound
- Beagador
- Beagle
- Beago
- Bear
- Bearded Collie
- Beaver
- Bedlington Terrier
- Bengal Tiger
- Bernedoodle
- Bernese Mountain Dog
- Bernese Shepherd
- Bichon Frise
- Bichpoo
- Biewer Terrier
- Binturong
- Birman
- Bison
- Black Rhinoceros
- Black Russian Terrier
- Bloodhound
- Blue Lacy Dog
- Blue Whale
- Bluetick Coonhound
- Bobcat
- Boglen Terrier
- Bolognese Dog
- Bombay
- Bongo
- Bonobo
- Borador
- Border Collie
- Border Terrier
- Bordoodle
- Borkie
- Bornean Orang-utan
- Borneo Elephant
- Boston Terrier
- Bottlenose Dolphin
- Bowhead Whale
- Boxador
- Boxer Dog
- Boxerdoodle
- Boykin Spaniel
- Brazilian Terrier
- British Timber
- Brown Bear
- Buffalo
- Bull Shark
- Bull Terrier
- Bulldog
- Bullmastiff
- Burmese
- Cairn Terrier
- Camel
- Canaan Dog
- Canadian Eskimo Dog
- Capybara
- Caracal
- Carolina Dog
- Cat
- Cavador
- Cavalier King Charles Spaniel
- Cavapoo
- Cesky Fousek
- Cesky Terrier
- Chameleon
- Chamois
- Cheetah
- Chesapeake Bay Retriever
- Chihuahua
- Chimpanzee
- Chinchilla
- Chinese Crested Dog
- Chinook
- Chipmunk
- Chipoo
- Chorkie
- Chow Chow
- Chow Shepherd
- Clouded Leopard
- Clumber Spaniel
- Coati
- Cockapoo
- Collared Peccary
- Collie
- Common Toad
- Corgidor
- Corgipoo
- Corkie
- Cotton-top Tamarin
- Cougar
- Cow
- Coyote
- Crab-Eating Macaque
- Cross River Gorilla
- Curly Coated Retriever
- Cuscus
- Dachsador
- Dachshund
- Dalmadoodle
- Dalmador
- Dalmatian
- Deer
- Deutsche Bracke
- Dhole
- Dingo
- Doberman Pinscher
- Dog
- Dogo Argentino
- Dogue De Bordeaux
- Dolphin
- Donkey
- Dorkie
- Dormouse
- Double Doodle
- Doxiepoo
- Drever
- Dugong
- Dunker
- Dusky Dolphin
- Eastern Gorilla
- Eastern Lowland Gorilla
- Echidna
- Egyptian Mau
- Elephant
- Elephant Seal
- Elephant Shrew
- Emperor Tamarin
- English Cocker Spaniel
- English Shepherd
- English Springer Spaniel
- Entlebucher Mountain Dog
- Epagneul Pont Audemer
- Ermine
- Eskimo Dog
- Eskipoo
- Estrela Mountain Dog
- False Killer Whale
- Fennec Fox
- Ferret
- Field Spaniel
- Fin Whale
- Finnish Spitz
- Fishing Cat
- Flat-Coated Retriever
- Flying Squirrel
- Fossa
- Fox
- Fox Terrier
- French Bulldog
- Fur Seal
- Geoffroys Tamarin
- Gerberian Shepsky
- Gerbil
- German Pinscher
- German Shepherd Guide
- German Sheppit
- German Sheprador
- Giant Panda Bear
- Giant Schnauzer
- Giant Schnoodle
- Gibbon
- Giraffe
- Glen Of Imaal Terrier
- Goat
- Goldador
- Golden Lion Tamarin
- Golden Retriever
- Golden Shepherd
- Golden-Crowned Flying Fox
- Goldendoodle
- Gopher
- Gorilla
- Great Dane
- Great Danoodle
- Great Pyrenees
- Greater Swiss Mountain Dog
- Greenland Dog
- Grey Mouse Lemur
- Grey Seal
- Greyhound
- Griffonshire
- Grizzly Bear
- Guinea Pig
- Hamster
- Hare
- Harrier
- Havanese
- Havapoo
- Havashire
- Hedgehog
- Highland Cattle
- Himalayan
- Hippopotamus
- Honduran White Bat
- Honey Badger
- Horse
- Howler Monkey
- Human
- Huskador
- Huskydoodle
- Hyena
- Ibis
- Ibizan Hound
- Impala
- Indian Elephant
- Indian Palm Squirrel
- Indian Rhinoceros
- Indochinese Tiger
- Indri
- Irish Doodle
- Irish Setter
- Irish Terrier
- Irish WolfHound
- Italian Greyhound
- Jack Russell
- Jackal
- Jaguar
- Japanese Chin
- Japanese Macaque
- Japanese Terrier
- Javan Rhinoceros
- Javanese
- Jerboa
- Kangaroo
- Kerry Blue Terrier
- Killer Whale
- Kinkajou
- Koala
- Kudu
- Labmaraner
- Labradane
- Labradoodle
- Labrador Retriever
- Labraheeler
- Lakeland Terrier
- Lemming
- Lemur
- Leopard
- Leopard Cat
- Leopard Seal
- Lhasapoo
- Liger
- Lion
- Llama
- Lynx
- Maine Coon
- Malayan Civet
- Malayan Tiger
- Maltese
- Maltipoo
- Manatee
- Manchester Terrier
- Mandrill
- Maned Wolf
- Markhor
- Marmot
- Masked Palm Civet
- Mastador
- Mastiff
- Meagle
- Meerkat
- Mexican Free-Tailed Bat
- Mini Labradoodle
- Miniature Bull Terrier
- Mink
- Minke Whale
- Mole
- Mongoose
- Mongrel
- Monkey
- Moorhen
- Moose
- Mountain Gorilla
- Mountain Lion
- Mouse
- Mule
- Muskox
- Muskrat
- Narwhal
- Neanderthal
- Neapolitan Mastiff
- Newfoundland
- Newfypoo
- Norfolk Terrier
- North American Black Bear
- Northern Inuit Dog
- Norwegian Forest
- Norwich Terrier
- Numbat
- Ocelot
- Okapi
- Old English Sheepdog
- Opossum
- Orang-utan
- Otter
- Pademelon
- Pangolin
- Panther
- Parson Russell Terrier
- Patas Monkey
- Patterdale Terrier
- Peekapoo
- Pekingese
- Pere Davids Deer
- Persian
- Petit Basset Griffon Vendéen
- Pheasant
- Pied Tamarin
- Pig
- Pika
- Pink Fairy Armadillo
- Pitador
- Platypus
- Pointer
- Polar Bear
- Pomapoo
- Pomeranian
- Poochon
- Poodle
- Poogle
- Porcupine
- Porpoise
- Possum
- Proboscis Monkey
- Pug
- Pugapoo
- Pugshire
- Puma
- Pygmy Hippopotamus
- Pygmy Marmoset
- Pyrador
- Pyredoodle
- Quokka
- Quoll
- Rabbit
- Raccoon
- Raccoon Dog
- Ragdoll
- Rat
- Rat Terrier
- Red Fox
- Red Panda
- Red Wolf
- Red-handed Tamarin
- Reindeer
- Rhinoceros
- Rock Hyrax
- Rottweiler
- Russell Terrier
- Russian Blue
- Saarloos Wolfdog
- Saber-Toothed Tiger
- Sable
- Saiga
- Saint Berdoodle
- Saint Bernard
- Saint Shepherd
- Samoyed
- Saola
- Schnoodle
- Scimitar-horned Oryx
- Scottish Terrier
- Sea Lion
- Sea Otter
- Seal
- Sealyham Terrier
- Serval
- Sheep
- Sheepadoodle
- Shepadoodle
- Shepkita
- Shiba Inu
- Shih Poo
- Shih Tzu
- Siamese
- Siberian
- Siberian Husky
- Siberian Tiger
- Siberpoo
- Silky Terrier
- Skunk
- Skye Terrier
- Sloth
- Smooth Fox Terrier
- Snapping Turtle
- Snowshoe
- Snowshoe Hare
- Somali
- South China Tiger
- Spanador
- Spectacled Bear
- Sperm Whale
- Spider Monkey
- Springerdoodle
- Squirrel
- Squirrel Monkey
- Sri Lankan Elephant
- Staffordshire Bull Terrier
- Steller’s Sea Cow
- Stoat
- Sugar Glider
- Sumatran Elephant
- Sumatran Orang-utan
- Sumatran Rhinoceros
- Sumatran Tiger
- Sun Bear
- Swedish Vallhund
- Taco Terrier
- Tamaskan
- Tapanuli Orang-utan
- Tapir
- Tarsier
- Tasmanian Devil
- Teddy Roosevelt Terrier
- Tenterfield Terrier
- Terrier
- Tibetan Mastiff
- Tibetan Terrier
- Tiffany
- Tiger
- Toy Fox Terrier
- Toy Poodle
- Tuatara
- Turkish Angora
- Uakari
- Utonagan
- Vampire Bat
- Vaquita
- Vervet Monkey
- Wallaby
- Walrus
- Warthog
- Water Buffalo
- Water Vole
- Weasel
- Weimardoodle
- Welsh Corgi
- Welsh Terrier
- West Highland Terrier
- Western Gorilla
- Western Lowland Gorilla
- Westiepoo
- Wheaten Terrier
- Whippet
- White Rhinoceros
- White Tiger
- White-Faced Capuchin
- Whoodle
- Wild Boar
- Wildebeest
- Wire Fox Terrier
- Wolf
- Wolverine
- Wombat
- Woolly Mammoth
- Woolly Monkey
- Xerus
- Yak
- Yorkie Poo
- Yorkshire Terrier
- Zebra
- Zebu
- Zonkey
- Zorse
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 14 punches the smallest known mammal on earth today is the Etruscan Shrew.