Discover, Appreciate, & Understand the Animal World!

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See All Animals A-Z!

We believe that if people know more about the world’s creatures they will better care for them. That’s why we add new animals for you to discover – each and every day! Learn about any animal using the search box below or subscribe to our YouTube Channel. Also, be sure to check out our growing list of Animal Quizzes.

Discover Your Favorite Animal Today!

Latest from A-Z Animals

Olde English Bulldogge Vs English Bulldog: What Are 8 Key Differences?

Is there a difference between an Olde English Bulldogge (or OEB) and an English Bulldog? You may think these two canines are the same based on their names, but you'd… Read More

By Jennifer Gaeng 2 hours ago

Timber Rattlesnake vs. Eastern Diamondback: What Sets These Fanged Serpents Apart?

Vipers like the timber rattlesnakes and the eastern diamondbacks are venomous snakes with long formidable fangs. They derive their family name Viperidae from the Latin vivus, "alive" and parere, "to… Read More

By Gabrielle Monia 3 hours ago

The One State You’re Most Likely to Get Struck by Lightning – And It’s Not Even Close

NOAA estimates there are around 40,000 thunderstorms on any given day around the world. With those thunderstorms, dangerous lightning can occur. In the U.S., Florida has the most days with… Read More

By Jennifer Geer 4 hours ago

Vulture vs Buzzard: What’s the Difference?

Did you know that there is a difference between a vulture vs buzzard? While these names are often used interchangeably to describe the same bird, vultures and buzzards are actually… Read More

By August Croft 5 hours ago

Boerboel vs. Cane Corso: What’s The Difference?

A cane corso and a boerboel are two separate popular domestic dog breeds that are similar in a variety of ways. They can both be trained to be hunting or… Read More

By Jennifer Gaeng 6 hours ago

Discover the 7 Types of Rattlesnakes in Utah

Rattlesnakes in Utah begin emerging from their winter brumation around April, when the weather starts warming up. They remain most active throughout the summer, until the weather begins to turn… Read More

By Kellianne Matthews 7 hours ago

Goat vs. Ram: What’s the Difference?

Goats and rams share several similarities at first glance, but there are many key differences between these animals that you can spot if you know what to look for. Here,… Read More

By August Croft 8 hours ago

Hippo vs Crocodile: Who Would Win in a Fight?

Hippopotamuses and crocodiles are renowned for being two of the most dangerous creatures in all of Africa; both are arguably more dangerous than the lion. These creatures stalk the precious… Read More

By Kyle Glatz 9 hours ago

F1 vs F1B vs F2 Bernedoodle: What’s the Difference?

Did you know that there are different types of bernedoodles known as F1 vs F1B vs F2 bernedoodles? What do these figures mean, how are these bernedoodles different from one… Read More

By August Croft 10 hours ago

The 7 Main Types of Animals And Their Characteristics

There are many different types of animals in the world, but some of the largest categories include:

Mammals around the world!


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.

See the complete list of mammals.

Close up of a colorful lizard


Lizards, dinosaurs, crocodiles, turtles, and snakes – all belong to that ancient and stout class of animals known as the reptiles. This is a diverse group with more than 10,000 different species and a huge representation in the fossil record. Once the dominant land vertebrates on the planet, reptiles still occupy just about every single ecosystem outside of the extreme north and south.

See the complete list of reptiles.

Beta fighting fish


Fish are aquatic vertebrates. They usually have gills, paired fins, a long body covered with scales, and tend to be cold-blooded. “Fish” is a term used to refer to lampreys, sharks, coelacanths and ray-finned fishes, but is not a taxonomic group, which is a clade or group containing a common ancestor and all its descendants.

See the complete list of fish.

Colorful birds


Birds, members of the class Aves, include more than 10,400 living species. Their feathers distinguish them from all other classes of animal; no other animals on earth have them. If you see an animal with feathers, it’s undoubtedly a bird. Like mammals, birds are warm-blooded vertebrates with four-chambered hearts. However, they are more closely related to reptiles and are believed to have evolved from dinosaurs.

See the complete list of birds.

Golden eyed leaf frog


The official class of amphibians is Amphibia. To have the classification of an amphibian, an animal must be a vertebrate, require water to survive, be cold-blooded, and spend time both on land and in water. Though other animals only live on land or in the water, amphibians have the unique ability to thrive equally in both. Amphibians cover over 6,000 different species across the globe, but about 90% are frogs.

See the complete list of amphibians.

Queen butterfly danaus gilippus on blue hydrangea flowers.


The definition of an invertebrate is any animal that does not have a backbone or vertebral column. The most prolific and easily recognizable members of the invertebrate family are insects. It’s estimated that upwards of 30 million individual species of invertebrates may exist accounting for between 90-95 percent of all organisms on the planet.

See the complete list of invertebrates.

Queen butterfly danaus gilippus on blue hydrangea flowers.


All insects are part of the taxonomical phylum Arthropoda, and they are collectively referred to as arthropods. It is common to see this name misspelled as “anthropod,” but this is not the correct term. They can be found in nearly every environment on the planet, and they currently account for over half of all known living organisms in the world. They have undergone many cycles of evolution depending on the resources available to them.

See the complete list of insects.

Explore Types of Wild Animals from Around the World

We track thousands of animals from every continent and corner on earth, and are adding more every day!

  • African Animals – Africa is home to some of the most incredible and dangerous animals in the world.
  • Asian Animals – Asia has the world’s longest coastline, and an amazing diversity of exotic animals, birds, and more.
  • Central American Animals – Discover the the nearly 400 different animals we track in Central America today.
  • Eurasian Animals – Eurasia has some of the rarest animals in the world, like Siberian Tigers and Snow Leopards.
  • European Animals – We track over 500 different animals in Europe, including wolves and bears.
  • North American Animals – North America has many beautiful national parks that house some of the rarest animals on earth.
  • Marine (Ocean) Animals – The ocean is teaming with life, from the smallest shrimp to the largest animal ever – the Blue Whale!
  • Oceanian Animals – Oceania has many islands, and the world’s highest concentration of marsupials.
  • South American Animals – Home to the stealthy Jaguar, the friendly Capybara, and many more!

See Endangered and Extinct Animals Lists

A-Z Animals follow’s the IUCN Red List of Threatened Species definitions of threatened and endangered animals. Please consult the lists below to learn more about which animals need our help the most

  • Extinct – Species that no longer exist on earth
  • Extinct in the Wild – Species that are only known to survive in captive or cultivated environments
  • Critically Endangered – Animals that face an extremely high risk of extinction in the wild
  • Endangered – Animal species that face a high risk of extinction in the wild
  • Vulnerable – Animal species that face a risk of extinction in the wild
  • Near Threatened – Species that are facing population challenges and likely to become vulnerable to extinction soon
  • Least Concern – Animals with strong populations that are not expected to face extinction risk in the near future
  • Data Deficient – Species where we lack adequate information to assess the risk
  • Not Evaluated – Animal species that have not been evaluated yet

Types of Animals By Letter: Explore A to Z Animal Lists

See lists of animals that start with every letter of the alphabet, from A to Z. We track all types of animals like lions and tigers, dogs and cats, even dinosaurs and spiders. Choose your favorite letter below to see all animals that start with it today.

A Asian Cockroach
Animals that Start with A

Example: The Asian Cockroach

A Bush Baby
Animals that Start with B

Example: The Bush Baby

A Chartreux
Animals that Start with C

Example: The Chartreux

A Dust Mites vs Bed Bugs: How to Spot the Differences
Animals that Start with D

Example: The Dust Mites vs Bed Bugs: How to Spot the Differences

A Elephant Beetle
Animals that Start with E

Example: The Elephant Beetle

A Flying Spiders! Where They Live and How They Actually Get Airborne
Animals that Start with F

Example: The Flying Spiders! Where They Live and How They Actually Get Airborne

A Great Pyrenees
Animals that Start with G

Example: The Great Pyrenees

A Hawk
Animals that Start with H

Example: The Hawk

A Italian Greyhound
Animals that Start with I

Example: The Italian Greyhound

A Jack Crevalle
Animals that Start with J

Example: The Jack Crevalle

A Klipspringer
Animals that Start with K

Example: The Klipspringer

A Liopleurodon
Animals that Start with L

Example: The Liopleurodon

A Maltipom
Animals that Start with M

Example: The Maltipom

A Norway Rat
Animals that Start with N

Example: The Norway Rat

A Otter
Animals that Start with O

Example: The Otter

A Pipefish
Animals that Start with P

Example: The Pipefish

A Quetzalcoatlus northropi
Animals that Start with Q

Example: The Quetzalcoatlus northropi

A Red Diamondback Rattlesnake
Animals that Start with R

Example: The Red Diamondback Rattlesnake

A Sea Urchin
Animals that Start with S

Example: The Sea Urchin

A The 10 Craziest Prehistoric Sharks
Animals that Start with T

Example: The The 10 Craziest Prehistoric Sharks

A Uakari
Animals that Start with U

Example: The Uakari

A Velociraptor
Animals that Start with V

Example: The Velociraptor

A White Rhinoceros
Animals that Start with W

Example: The White Rhinoceros

A Xoloitzcuintli
Animals that Start with X

Example: The Xoloitzcuintli

A Yellow Bullhead Catfish
Animals that Start with Y

Example: The Yellow Bullhead Catfish

A Zebra
Animals that Start with Z

Example: The Zebra

Everything To Know About Pet Dogs, Cats Birds, and More

Some of the most popular types of animals on earth are pets. A pet is a domesticated animal that lives with a person or family, usually in a house. The most common pets include dogs, cats, fish, and birds, but there are also many amazing exotic pets like reptiles, lizards, and more! Horses, goats, and pigs can also be pets too.

Pet Dogs

Dogs are the most popular type of pet on earth with nearly 500 million worldwide. Thats almost one dog for every 15 people on earth! There are hundreds of different dog breeds. The Irish Wolfhound is the largest dog breed, and was bred to hunt wolves. Chihuahuas are the smallest, and were likely bred for companionship or to hunt small rodents. The most popular dog breeds are below.

A Boston Terrier
Boston Terrier

Friendly, lovable and very strong!

A Irish Setter
Irish Setter

Has a beautiful coat that's flowing and feathered!

A Golden Retriever
Golden Retriever

Trusting, kind and gentle!

Pet Cats

Cats are the second most popular pet on earth with nearly 400 million worldwide. Thats almost one pet cat for every 20 people on earth! You can read about the hundreds of different cat breeds, from the large to the small. The most popular cat breeds are below

A Abyssinian

One of the oldest cat breeds in the world!

A Australian Mist
Australian Mist

The only cat breed to originate in Australia.

A Ragdoll

One of the larger breeds of domestic cat!

Pet Product Reviews

Pets are important members of our families and should be cared for. The AZ Animals team reviews the latest research on pet health, consults veterinarian best practices, and works directly with vet health specialists to review the best products for your dog, cat, and other pets. We’re excited to share our expert pet product recommendations with you, including the best dog food, best cat food, and best tanks for your pet fish

More Animal News, Facts, Rankings, and More!

Pterodactyl vs Pteranodon: What’s the Difference?

There is still so much we don’t know about ancient creatures, whether they are reptiles or dinosaurs, including the differences between a Pterodactyl vs Pteranodon. These two creatures may belong… Read More

By August Croft 11 hours ago

Red Shouldered Hawk vs Cooper’s Hawk: 5 Differences

There are so many different types of hawks that you may be wondering: what’s the difference between a red shouldered hawk vs Cooper’s hawk? While both of these birds of… Read More

By August Croft 12 hours ago

11 Animals that Hunt Rattlesnakes

While human beings prefer to avoid rattlesnakes at all costs, there are some animals that hunt rattlesnakes as part of their daily meals or lives. But what might some of… Read More

By August Croft 13 hours ago

Cat vs. Rattlesnake: Who Would Win in a Fight?

Domesticated cats are common pets that people love. Although we tend to think of them as relatively harmless, the truth is that these animals are adept hunters with very good… Read More

By Kyle Glatz 14 hours ago

Discover the Largest Bear to Ever Exist (Up to 4X the Size of a Grizzly!)

Bears are among the foremost predators on earth today. Although the planet is currently home to some massive bears, prehistoric bears used to be much, much, bigger. Polar bears and… Read More

By Colby Maxwell 15 hours ago

The 15 Types of Rattlesnakes in Arizona in 2024

Arizona is home to the highest number of rattlesnakes in the United States. There are at least 15 different types of rattlesnakes in Arizona. However, these snakes are spread out… Read More

By Kellianne Matthews 16 hours ago

American Bully Vs American Bulldog: Is There a Difference?

When it comes to comparing an American Bulldog vs American Bully, they are often confused by their name and appearance. Although they share some similarities, they are very different dogs.… Read More

By Jennifer Gaeng 17 hours ago

21 Chicken Breeds That Lay White Eggs

If you’ve never had farm fresh eggs, you might not know that they come in an assortment of colors. Chickens lay brown eggs, white eggs, pink eggs, blue eggs, green… Read More

By Tavia Fuller Armstrong 18 hours ago

Meet the Spinosaurus – One of The Largest Carnivorous Dinosaur in History (Bigger than a T-Rex!)

The Tyrannosaurus Rex is one of the greatest prehistoric terrors. It is so frightening and violent that it has become a fixed icon in the social imagination. It has even… Read More

By Kellianne Matthews 1 day ago

Can Dogs Eat Chicken Feet?

Pet guardians are becoming more informed than ever about what their dogs are eating. This is an excellent thing, and I have high hopes that it'll push dog food companies… Read More

By Katelynn Sobus 1 day ago

Bernese Mountain Dog vs Golden Retriever: 9 Key Differences Explained

Bernese mountain dogs and golden retrievers are known for being great family dogs. Both breeds are affectionate, intelligent, and loyal to a fault. However, several differences exist that potential owners… Read More

By Kathryn Dueck 1 day ago

28 White Chicken Breeds You Are Sure to Love

What is it about snow-white chickens? Breeders have developed white varieties of most types of chickens all over the world. From tall and lanky to short and round, these birds… Read More

By Tavia Fuller Armstrong 1 day ago

Anatolian Shepherd vs Great Pyrenees: Key Differences Explained

The Anatolian Shepherd and Great Pyrenees are quite different from one another despite both showing strong guarding tendencies. The Anatolian Shepherd is characterized by long legs and neck, a curled-up… Read More

By Katelynn Sobus 1 day ago

Skipjack Tuna vs Albacore Tuna: 6 Key Differences

Tuna is an important fish for people all over the world. Whether sought for an intense rod and reel battle by an angler or caught for sushi or canning, tuna… Read More

By Colby Maxwell 1 day ago

Mini Lop Vs Holland Lop Bunnies: How To Tell The Difference

When trying to tell the difference between Mini Lop vs Holland Lop bunnies, you may think the name says it all. But the Mini Lop bunny has a misleading name… Read More

By Peralee Knight 1 day ago

Discover The “Boss” Grizzly Bear That’s Been Hit by a Train And Survived

The Boss of Banff National Park arrives in the area around early March- marking the beginning of bear season for Canadian citizens. He spends his time stalking through the National… Read More

By Jude Speegle 1 day ago

9 Snakes That Eat Other Snakes (Even Rattlesnakes!)

The ouroboros is an ancient symbol depicting a serpent eating its tail. It represents continual rebirth and the unity of all things. Things perpetually change in a cycle of destruction… Read More

By Gabrielle Monia 1 day ago

Mini Blue Heeler Vs Standard Heeler

When it comes to the Mini Blue Heeler vs the Standard Heeler, there are a few key differences: size, breeding restrictions, and American Kennel Club (AKC) recognition. The Standard Heeler,… Read More

By Katelynn Sobus 2 days ago

The Largest Alligator Gar Ever Caught in Oklahoma

The alligator gar are fearsome fish in terms of size and appearance. Their scientific name is Atractosteus spatula and they are among the largest freshwater fish on the planet. They… Read More

By Sharon Parry 2 days ago

16 Ideal Tank Mates to Pair With Neon Tetras

One of the smallest and most popular schooling fish in aquariums happens to be neon tetras. These fish are easily recognized by their neon red and blue coloration, with a… Read More

By Sarah Psaradelis 2 days ago

See all of A-Z Animals News and Information.

Animal Reference Guides And Educational Resources

We believe if people are more educated about the world’s animals, they will better car for them. That’s why we are building the world’s greatest animal encyclopedia, completely free to you. Please take a moment to learn more about animals today using these helpful guides and resources:

  • Reference Library – See helpful information on conservation, classification, animal evolution, and more
  • Glossary – A list of scientific and technical animal terms, with definitions
  • Animal Habitats – Learn all about different animal habitats
  • Diet – The different animal diets like omnivores, herbivores, and carnivores defined with examples
  • Behavior – Learn all about animal intelligence, communication, community, language, migration, and more.

FAQs (Frequently Asked Questions) 

What are the 6 types of animals?

The 6 types of animals are mammals, fish, amphibians, reptiles, birds and invertebrates. Additionally, animals are classified in many different ways, which you may learn about in this complete guide to animal classification.

What are the 10 most popular animals?

The 10 most popular animals on AZ Animals are:

  1. Lion
  2. Panther
  3. Amur Leopard
  4. Polar Bear
  5. White Tiger
  6. Wolf
  7. Millipede
  8. Arctic Fox
  9. Marble Fox
  10. Rhinoceros 

How many animals are there?

There are over 1 million known animal species and more than 98% of those are insects, which are indeed animals.