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

Are Birds Mammals? Explaining Their Animal Classification

Quick Answer: No, birds are not mammals. They are considered avians. Birds aren't considered mammals even though many of them are warm-blooded and breathe oxygen. Mammals give birth to live… Read More

By Rebecca Bales 1 hour ago

10 Birds That Chirp The Loudest

The birds that we can easily hear from our windows always seem loud just because they're nearby. It's a bird's prerogative to generally be audible enough to everyone in the… Read More

By Heather Ross 3 hours ago

7 Deadliest Birds On Earth and What Makes Them So Dangerous

While the age of dinosaurs may be long gone, these majestic and terrifying creatures continue on today as various bird species. And while the typical cardinal or bluebird doesn't pose… Read More

By Rebecca Bales 4 hours ago

10 Animals Believed Extinct That Were Found Alive! 

So many humans live on Earth, it’s hard to imagine there are animals we haven’t seen for years, decades, or even millions of years, but it keeps happening! Animals believed… Read More

By Rebecca Mathews 6 hours ago

Discover the World’s Largest Lions

A male lion, with its formidable size and flowing mane, is a majestic animal rightfully known as the king of the jungle. Female lions are similarly ferocious and are amongst… Read More

By Jesse Elop 7 hours ago

What Eats Snakes? 10 Animals Brave Enough to Feast on Snakes

Snakes are undoubtedly one of the most dangerous species on the planet. Out of the three thousand different species that inhabit this planet only two hundred can actually harm a… Read More

By Lex Basu 8 hours ago

11 Unusual Pets of Rich Celebrities: Would You Spend Money on These?

If you were rich and famous, would you keep an exotic animal as a pet? These celebrities did. See if you agree with keeping these unusual pets, or are they… Read More

By Drew Wood 8 hours ago

The 10 Largest Insects in the World and Where You Might Encounter Them

Hundreds of millions of years ago, gigantic insects once roamed the planet (including a dragonfly that measured 28 inches). Why have insects since become so small? The most important reason… Read More

By Dana Mayor 9 hours ago

The 10 Biggest Spiders in the World – Are Any Dangerous?

If you are afraid of spiders, then you may be asking, "What is the biggest spider in the world?" To determine which is the biggest, there are two factors to… Read More

By Rebecca Bales 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 Beauceron
Animals that Start with B

Example: The Beauceron

A Central Ranges Taipan
Animals that Start with C

Example: The Central Ranges Taipan

A Dinocrocuta
Animals that Start with D

Example: The Dinocrocuta

A Earless Monitor Lizard
Animals that Start with E

Example: The Earless Monitor Lizard

A Fox Snakes
Animals that Start with F

Example: The Fox Snakes

A Geoffroys Tamarin
Animals that Start with G

Example: The Geoffroys Tamarin

A Hummingbird
Animals that Start with H

Example: The Hummingbird

A Icadyptes
Animals that Start with I

Example: The Icadyptes

A Jaguarundi Cat
Animals that Start with J

Example: The Jaguarundi Cat

A Kouprey
Animals that Start with K

Example: The Kouprey

A Lace Monitor
Animals that Start with L

Example: The Lace Monitor

A Manatee
Animals that Start with M

Example: The Manatee

A Native American Totem Animals and Their Meanings
Animals that Start with N

Example: The Native American Totem Animals and Their Meanings

A Olive Baboon
Animals that Start with O

Example: The Olive Baboon

A Pangolin
Animals that Start with P

Example: The Pangolin

A Quagga
Animals that Start with Q

Example: The Quagga

A Reindeer
Animals that Start with R

Example: The Reindeer

A Squash Beetle
Animals that Start with S

Example: The Squash Beetle

A Thresher Shark
Animals that Start with T

Example: The Thresher Shark

A Uinta Ground Squirrel
Animals that Start with U

Example: The Uinta Ground Squirrel

A Vicuña
Animals that Start with V

Example: The Vicuña

A White Sturgeon 
Animals that Start with W

Example: The White Sturgeon 

A X-Ray Tetra
Animals that Start with X

Example: The X-Ray Tetra

A Yorkiepoo
Animals that Start with Y

Example: The Yorkiepoo

A Zebra Spitting Cobra
Animals that Start with Z

Example: The Zebra Spitting Cobra

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!

The 10 Highest Jumping Animals in the World

Who are the Harold Miners of the animal kingdom? What are the highest jumping animals in the world? According to researchers, copepods — a microscopic set of crustaceans — are… Read More

By Lex Basu 12 hours ago

The Top 10 Fastest Sea Animals

What are the 10 fastest sea animals? As anyone who’s gone swimming knows, it’s harder to move in water than it is in air. This is because water is denser… Read More

By Heather Hall 13 hours ago

8 Reasons Dogs Are Better than Cats

It is no secret that there is a long-standing debate over which pet is better: dogs or cats. While both pets have their unique benefits, there are five key reasons… Read More

By Marisa Wilson 13 hours ago

The 8 Tallest Animals in the World

Whether you’ve been on an African safari, taken a walk around a zoo, or just looked through some nonfiction books, you likely know that there are a number of animals… Read More

By Krishna Maxwell 15 hours ago

Flying Spiders! Where They Live and How They Actually Get Airborne

Flying spiders? Yes, you read that right. If you have arachnophobia - a fear of spiders - flying spiders may sound like something out of a nightmare. Social media influencers… Read More

By Rebecca Bales 16 hours ago

12 Animals That Represent Wisdom and Intelligence

Which animals represent wisdom and intelligence? Owls are at the top of the list. As nocturnal hunters, owls know how to navigate the dark. And according to Greek mythology, a… Read More

By Crystal 16 hours ago

How to Train a Cat to Walk on a Leash

It's rare to see anyone walking their cat on a leash, but cats can be trained to do it. There are some good reasons to do it that benefit both… Read More

By Drew Wood 16 hours ago

Gorilla vs Lion: Which Animals Is the True ‘King of the Jungle’?

Lions and gorillas are two creatures that roam parts of Africa. Both of them could easily dispatch human beings and other animals alike with insurmountable strength, speed, and natural weapons… Read More

By Kyle Glatz 17 hours ago

The Top 10 Highest Flying Birds in the World

Over millions of years, birds have developed forelimbs — wings — that let them take to the skies. These creatures can sleep, eat, and mate while in flight. Migratory birds… Read More

By Heather Hall 19 hours ago

The 10 Best and Most Iconic Farm Animals

When you're creating a farm, you need to know about the most useful animals for that environment and what you intend to do with the animals. Are you looking for… Read More

By Krishna Maxwell 23 hours ago

The 10 Most Forgetful Animals With the Worst Memory

Have you ever wondered which animals are the most forgetful or have the worst memories? You might think you have the worst memory, but you're nothing compared to the animals… Read More

By Nixza Gonzalez 1 day ago

9 Animals That Fly (That Aren’t Birds!)

When you think of flying animals, the first things that come to mind are birds. Birds are some of the closest relatives to dinosaurs, and they pretty much own the… Read More

By Rebecca Bales 1 day ago

10 Birds With Incredibly Long Tails and What They Use Them For

Making a list of birds with a long tail isn’t as straightforward as it seems. For example, the peacock is not on the list. Why? Because the beautiful feathers that… Read More

By Rebecca Bales 1 day ago

10 Animals With the Biggest Horns in the World

Horns are one of the most visible and impressive adaptations developed by some mammals in the animal kingdom. Lots of animals grow horns, including cows, goats, buffalo, antelope, rhinos, and… Read More

By Patrick Sather 2 days ago

10 Deep Sea Sharks Rarely Seen By Humans

Of the many types of sharks, deep sea sharks are definitely the most distinctive looking! Because deep in the darkest parts of the oceans, at unimaginable depths, live some of… Read More

By Hannah Ward 2 days ago

8 Bugs That Look Like Lice (Know The Difference)

It can be pretty concerning when you see a bug on your head or body that looks like a louse, but that may not always be true. Many other bugs… Read More

By Lev Baker 2 days ago

9 Common Types of Black Bugs with Pictures and Identification Guide

Are you seeing black bugs in your home or around your property? Do you need help identifying a pest so you can rid your dwelling of a nuisance? There are… Read More

By Niccoy Walker 2 days ago

Stinging Insects: 10 of the Most Painful Insect Stings in the World

Stinging insects are not exactly the most popular living creatures in the world. Most people's reaction to them is to swat them or run away. All it takes is one… Read More

By Drew Wood 2 days ago

6 Black and White Spiders (With Pictures of Each!)

Spiders come in so many colors, shapes, and sizes. Black and white spiders are common and they also have unique markings. For example, some spiders are black with white stripes… Read More

By Nixza Gonzalez 2 days ago

10 Animals That Hibernate the Longest (Bears Are Not #1!)

To avoid the harsh winter weather, a lot of creatures in the north hibernate. A recent study, however, demonstrates that one species, in particular, can maintain total freezing for longer… Read More

By Jennifer Gaeng 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.