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

The 12 Best Tank Mates for Bala Sharks

Bala sharks are large freshwater fish with social and peaceful temperaments. These active swimmers frequently form shoals in community aquariums. The key to maintaining bala sharks as pets is keeping… Read More

By Sarah Psaradelis 36 mins ago

15 Most Terrifying Spiders Found in Japan

Japan is a beautiful country with something for everyone. If you love exploring the breathtaking countryside and experiencing the nightlife of one of the biggest cities in the world, Japan should… Read More

By Katie Downey 3 hours ago

American Akita vs Japanese Akita: 5 Key Differences

Did you know that there are two different Akita breeds known as the American Akita vs Japanese Akita? How are these breeds similar, and in what ways do they differ?… Read More

By August Croft 12 hours ago

The 6 Most Snake-Infested Lakes in Kentucky

Kentucky boasts an array of picturesque lakes that hold both aesthetic charm and ecological significance. These water bodies play a pivotal role in sustaining the delicate balance of the local… Read More

By Katarina Betterton 13 hours ago

The 10 Fastest Sharks in the World

There are more than 500 species of sharks in the world today and they are some of the best-known predators around. Although most sharks typically swim around at a leisurely… Read More

By Hannah Ward 13 hours ago

8 Reasons Your Dog Is Staring At The Wall (4 Are Dangerous)

If you have ever walked into a room and seen your beloved canine staring intently at the wall, it can be genuinely a strange sight. We all know as dog… Read More

By Austin S. 15 hours ago

The Oldest Birds of All Time (One Reached 120 Years Old!)

Talking about age is taboo in some circles. When we talk about the age of a bird, it is a little more complex than you might think. Birds don’t show… Read More

By Michelle Stacy 16 hours ago

10 Birds That Can’t Fly

It’s a well-known fact that most birds can fly. Some birds fly to catch prey, while others fly to escape predators. Regardless, the ability to fly is one of the… Read More

By Patrick Sather 17 hours ago

10 Dinosaurs With Horns

 Deer, elk, moose, and goats are just some of the animals alive today that have horns, but millions of years ago, there were also many dinosaurs with horns. In this… Read More

By Emilio Brown 17 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 Alligator Gar
Animals that Start with A

Example: The Alligator Gar

A Baby Lions: 5 Adorable Cub Pictures and 5 Interesting Facts About The Cute Apex Predators
Animals that Start with B

Example: The Baby Lions: 5 Adorable Cub Pictures and 5 Interesting Facts About The Cute Apex Predators

A Codfish
Animals that Start with C

Example: The Codfish

A Disco Clam
Animals that Start with D

Example: The Disco Clam

A Eastern Racer
Animals that Start with E

Example: The Eastern Racer

A Finch
Animals that Start with F

Example: The Finch

A Goat vs. Ram: What’s the Difference?
Animals that Start with G

Example: The Goat vs. Ram: What’s the Difference?

A Hippopotamus
Animals that Start with H

Example: The Hippopotamus

A Indian Rhinoceros
Animals that Start with I

Example: The Indian Rhinoceros

A Jaguar vs Panther: 6 Key Differences Between These Stealthy Cats
Animals that Start with J

Example: The Jaguar vs Panther: 6 Key Differences Between These Stealthy Cats

A Killifish
Animals that Start with K

Example: The Killifish

A Little Penguin
Animals that Start with L

Example: The Little Penguin

A Meet the European Cave Lion – A Cat So Big, It Hunted Bears
Animals that Start with M

Example: The Meet the European Cave Lion – A Cat So Big, It Hunted Bears

A New Hampshire Red Chicken
Animals that Start with N

Example: The New Hampshire Red Chicken

A Oarfish
Animals that Start with O

Example: The Oarfish

A Pink-Necked Green Pigeon
Animals that Start with P

Example: The Pink-Necked Green Pigeon

A Quail
Animals that Start with Q

Example: The Quail

A Red Panda
Animals that Start with R

Example: The Red Panda

A San Francisco Garter Snake
Animals that Start with S

Example: The San Francisco Garter Snake

A Tree Snake
Animals that Start with T

Example: The Tree Snake

A Ural owl
Animals that Start with U

Example: The Ural owl

A Viper Shark (dogfish)
Animals that Start with V

Example: The Viper Shark (dogfish)

A Wisconsin’s 3 Most Dangerous Spiders This Summer, and How to Spot Them
Animals that Start with W

Example: The Wisconsin’s 3 Most Dangerous Spiders This Summer, and How to Spot Them

A X-Ray Tetra
Animals that Start with X

Example: The X-Ray Tetra

A Yellow Bullhead Catfish
Animals that Start with Y

Example: The Yellow Bullhead Catfish

A Zuchon
Animals that Start with Z

Example: The Zuchon

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!

5 Massive Bears Larger Than a Grizzly

Grizzly bears are huge, and they are one of the largest mammals that walk North America. There are a variety of bears that have inhabited Earth, and here you will… Read More

By Emilio Brown 18 hours ago

Wirehaired Pointing Griffon vs German Wirehaired Pointer: 5 Differences

Did you know that there are two very different gun dog breeds known as the Wirehaired Pointing Griffon vs German Wirehaired Pointer? While these two breeds look very similar, there… Read More

By August Croft 18 hours ago

Discover 10 Black and White Chicken Breeds

Chickens are some of the most popular animals to keep, whether you’ve got a small holding, a farm, or just a large garden. They are friendly and amusing to watch… Read More

By Hannah Ward 20 hours ago

10 Largest Chickens In The World in 2024

Chickens have long been a source of food-producing meat and eggs for centuries.  Found worldwide, with more than 500 different breeds in existence today, there is something for everyone -… Read More

By Hannah Ward 22 hours ago

Hungry Bears Raid a Krispy Kreme Van and Gobble Down 26 Packs of Doughnuts

The Krispy Kreme store in Muldoon, Alaska was the victim of a daring robbery last year. The store manager was alerted by a call but she couldn’t quite believe what… Read More

By Sharon Parry 22 hours ago

8 Dinosaurs With Crests

Dinosaurs have a variety of looks and sizes. Feathers, horns, and wings are some traits that are common for dinosaurs, but one of the more rare features is a crest.… Read More

By Emilio Brown 23 hours ago

Don’t Get Bit! Revealing 8 Snakes that Don’t Have Antivenom

Imagine stepping off the trail to take a photo of a unique wildflower when you suddenly feel a prick on your ankle. You look down to see the tail end… Read More

By Cindy Rasmussen 1 day ago

Doberman vs German Shepherd: Which is the Better Guard Dog?

Both the Doberman and the German Shepherd are popular as protective guard dogs that can help keep your home and family safe. However, when it comes down to the Doberman… Read More

By Megan Martin 1 day ago

T-Rex vs Spinosaurus: Who Would Win in a Fight?

The T-Rex was a massive dinosaur that roamed the planet 68-66 million years ago. The Spinosaurus was another, an even larger reptile that lived about 93.6 million years ago, so… Read More

By Kyle Glatz 2 days ago

Anatolian Shepherd vs Kangal: Is There a Difference?

While the debate continues today as to whether or not there is a difference between an Anatolian shepherd vs Kangal, we’re here to shine some light on these two dog… Read More

By August Croft 2 days ago

9 Dinosaurs With Long Necks

Millions of years ago, dinosaurs were abundant on the earth, and one common type was the sauropod. These dinosaurs had some of the longest necks in history and are also… Read More

By Emilio Brown 2 days ago

Aspirin Dosage Chart For Dogs: Risks, Benefits, And When To Be Worried

Humans have made it second nature to reach for an aspirin pill when they feel any type of pain. Remember how that aspirin helped alleviate that headache you constantly have?… Read More

By Austin S. 2 days ago

The 10 Non-Venomous Snakes in Georgia in 2024

Spanning 57,000 square miles, Georgia has a diverse range of habitats that are home to thousands of wonderful animals.  While some animals are incredibly rare or secretive and are hardly… Read More

By Hannah Ward 2 days ago

Epic Battles: Grizzly Bear vs. Lion

Grizzly bears are some of the largest, most powerful mammals in the world. However, their modern range isn’t conducive to a meeting with lions, the big cats native to Africa.… Read More

By Kyle Glatz 2 days ago

14 Dinosaurs That Lived in Texas (And Where to See Fossils Today)

Dinosaurs were exceptional creatures that pushed the limits of evolution. These beautiful creatures occurred in various shapes and sizes, from the enormous long-necked Diplodocus to the bipedal predators like the… Read More

By Taiwo Victor 2 days ago

American vs European Basset Hound: Is There a Difference?

You may not know this, but there are two distinct dog breeds known as the American vs European basset hound. While both of these dogs are essentially identical, are there… Read More

By August Croft 2 days ago

Monitor Lizard vs Komodo Dragon: What’s the Difference?

Monitor lizards and Komodo dragons are very similar creatures. In fact, Komodo dragons are a type of monitor lizard- but there are many different species of monitor lizards other than… Read More

By August Croft 2 days ago

Sprats vs. Sardines: What Are The Differences?

Many beautiful and strange fish fill the oceans of the world. Although it’s more entertaining to talk about the large, dangerous sharks that lurk in the water, other important fish… Read More

By Kyle Glatz 2 days ago

Rattlesnakes While Hiking: How To Prepare and What To Do If You See One

Most people who have gone outdoors in the American southwest know to keep an eye out for rattlesnakes while hiking. But, would you believe that rattlesnakes actually live across the… Read More

By Brandi Allred 2 days ago

Rooster vs Chicken: What’s the Difference?

While it can be difficult to know the difference between a rooster vs chicken at first, there are many key differences between these two birds. For example, while all roosters… Read More

By August Croft 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.