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

12 Most Terrifying Spiders Found In Mexico

Mexico is one of the three countries in North America known for its tropical and arid environments. The wildlife in the country is diverse and differs widely from that of… Read More

By Emilio Brown 7 hours ago

Do Snakes Have Emotions? Can They Feel Happiness?

When people get pets, they often expect to have a new best friend. This can happen easily with a cat, dog, and even rodents like rats. However, can it happen… Read More

By Nilani Thiyagarajah 8 hours ago

Why One Florida Beach Is Being Called the “Shark Bite Capital of the World”

Florida has some of the most beautiful beaches in the United States. That's why Florida's beaches are always packed with visitors. The amazing surf breaks in this area also attract… Read More

By Volia Schubiger 15 hours ago

Must See: A Great White Shark Saves South African from Four Massive Sharks

We all hope that there would be someone to save us if we were attacked by a group of sharks but we would never expect our rescuer to be another… Read More

By Sharon Parry 16 hours ago

8 Spiders That Look Like Brown Recluses, But Are Not

When you talk about venomous spiders in the United States, the brown recluse spider probably comes to mind. But not all spiders that resemble this dangerous critter are harmful. In… Read More

By Lev Baker 19 hours ago

Discover the 9 Most Snake-Infested Rivers In The United States

Home to around 50 species of snakes, of both venomous and harmless varieties, the United States offers plenty of snake-spotting opportunities. Now, whether or not you want to spot the… Read More

By Sandy Porter 20 hours ago

12 Most Terrifying Spiders Found in New Zealand

New Zealand is an amazing and beautiful country. New Zealand's beaches, mountains, caverns, and land in between are all some of the most spectacular places on earth. It is a one-of-a-kind… Read More

By Katie Downey 1 day ago

The 15 Best Tank Mates to Pair With Red Tail Sharks

Red tail sharks (Epalzeorhynchos bicolor) have beautiful charcoal-black bodies with bright red tails. Their beauty is mesmerizing, and they sure are fun to watch in an aquarium, but you need… Read More

By Lev Baker 1 day ago

7 Most Terrifying Spiders Found In Jamaica

Spiders are abundant around the world, with more than 50,000 species identified. Each year brings with it the discovery of hundreds of new spider species. These arachnids inhabit every continent… Read More

By Emilio Brown 1 day 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 Carp
Animals that Start with A

Example: The Asian Carp

A Brown Dog Tick
Animals that Start with B

Example: The Brown Dog Tick

A Cape Lion
Animals that Start with C

Example: The Cape Lion

A Desert Kingsnake
Animals that Start with D

Example: The Desert Kingsnake

A English Cream Golden Retriever
Animals that Start with E

Example: The English Cream Golden Retriever

A Freeway Ball Python
Animals that Start with F

Example: The Freeway Ball Python

A Glass Frog
Animals that Start with G

Example: The Glass Frog

A Hairy Frogfish
Animals that Start with H

Example: The Hairy Frogfish

A Irish Setter
Animals that Start with I

Example: The Irish Setter

A Jack Russells
Animals that Start with J

Example: The Jack Russells

A Koolie
Animals that Start with K

Example: The Koolie

A Lion Eyes: Why Don’t They Look Like Cat Eyes?
Animals that Start with L

Example: The Lion Eyes: Why Don’t They Look Like Cat Eyes?

A Meagle
Animals that Start with M

Example: The Meagle

A Night Heron
Animals that Start with N

Example: The Night Heron

A Orca vs Great White Shark: Which Ocean Powerhouse Is The Superior Predator?
Animals that Start with O

Example: The Orca vs Great White Shark: Which Ocean Powerhouse Is The Superior Predator?

A Palaeophis
Animals that Start with P

Example: The Palaeophis

A Queen Snake
Animals that Start with Q

Example: The Queen Snake

A Red Aphids
Animals that Start with R

Example: The Red Aphids

A Strong Enough To Survive: The 10 Weakest Animals In The World
Animals that Start with S

Example: The Strong Enough To Survive: The 10 Weakest Animals In The World

A Treeing Walker Coonhound
Animals that Start with T

Example: The Treeing Walker Coonhound

A Uinta Ground Squirrel
Animals that Start with U

Example: The Uinta Ground Squirrel

A Vervet Monkey
Animals that Start with V

Example: The Vervet Monkey

A Water Vole
Animals that Start with W

Example: The Water Vole

A Xingu River Ray
Animals that Start with X

Example: The Xingu River Ray

A Yellow Belly Ball Python
Animals that Start with Y

Example: The Yellow Belly Ball Python

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!

Cane Corso vs Doberman: What’s Different?

Whether you’re just curious or you’re someone looking for a guard dog, you may be wondering what’s the difference between the Cane Corso vs Doberman. While they can be similar… Read More

By Megan Martin 1 day ago

The 15 Best Tank Mates to Pair With Rainbow Sharks

Don’t worry; rainbow sharks are not true sharks - they are just named after their shark-like appearance due to their red dorsal fin. Scientifically classified as Epalzeorhynchos frenatum, rainbow sharks… Read More

By Lev Baker 1 day ago

The Top 10 Biggest Spiders Crawling Around the United States

Spiders can be a common fear among people. Fortunately, the majority of spiders in the United States are not as colossal as those inhabiting Australia or South America. However, some… Read More

By Lev Baker 1 day ago

Coral Snake vs Kingsnake: 5 Key Differences Explained

Coral snakes and scarlet kingsnakes are often confused for one another and it’s certainly an easy mistake to make given how strikingly similar they are. After all, they’re both brightly… Read More

By Hannah Ward 1 day ago

Meet the Absolute Largest Spider in History

Spiders are arachnids that are best known for their distinctive eight-legged appearance. There are around 50,000 different species of spiders that are recognized today. They are found everywhere in the… Read More

By Hannah Ward 2 days ago

Discover the 11 Sharks Found in San Francisco Bay

San Francisco Bay is truly a treasure of marine biodiversity. Over 70 different kinds of native fish call this bay their home, and among these marine inhabitants, approximately 11 are… Read More

By Lev Baker 2 days ago

Discover the Top 15 Most Expensive Snakes in the World

Snakes are frightening to some people and fascinating to others. Some people are such big snake enthusiasts they would happily spend thousands of dollars to keep a rare snake species… Read More

By Lev Baker 2 days ago

9 Dinosaurs With Feathers

Around 230 million years ago dinosaurs roamed the earth, but today all we have left are fossils. The most accepted theory of what caused the extinction of the dinosaurs is… Read More

By Emilio Brown 2 days ago

The Most Snake-Infested Lakes in Virginia

Virginia, a state in the eastern United States, has many lakes and reservoirs — and those lakes and reservoirs have snakes. A few lakes, in particular, offer a fascinating opportunity… Read More

By Kyler Matthews 2 days ago

Discover the Top 5 Most Expensive Spiders You Can Buy in 2024

They’re not a pet for just anyone, but spider enthusiasts recognize the beauty and appeal of different spider species. Discover the five most expensive spiders you can buy in 2024!… Read More

By Angie Menjivar 2 days ago

Water Moccasins vs. Cottonmouth Snakes: Are They Different Snakes?

Contrary to popular belief, water moccasins and cottonmouth snakes are not different types of snakes. It’s often thought that water moccasins are harmless, non-venomous creatures, and cottonmouths are more dangerous… Read More

By Jeremy Phillips 2 days ago

9 Ancient Dinosaurs That Were Like Giant Alligators

Crocodiles and alligators are massive animals even by today's standards. Alligators belong to an animal group known as "ruling reptiles." The name of this animal group is Archosaurs. The archosaurs… Read More

By Austin S. 2 days ago

7 Pet Snakes That Stay Small

There are a few reasons ‌snakes can be frightening. They're muscular and legless, and some species' constricting abilities can make people's skin crawl. Some others find snakes fascinating. You're curious… Read More

By Austin S. 2 days ago

Moose vs Elk: 5 Key Differences Explained

Moose and elk are both large mammals from the deer family.  Given how similar they are it’s really easy for the two to be confused, and more often than not… Read More

By Hannah Ward 3 days ago

The 1000-Year Storm That Blasted California

California faced some extreme weather at the beginning of 2024. The heavy rainfalls and the massive number of mudslides lead to news teams throwing around a term. The storm was… Read More

By Nina Phillips 3 days ago

Discover the 10 Most Dangerous (Deadliest) Animals in Florida

Florida is home to alligators, crocodiles, gigantic invasive pythons, panthers, and some of the most shark-infested waters in the world. So it's no surprise people are curious just what are… Read More

By Cindy Rasmussen 3 days ago

Brachiosaurus vs Brontosaurus: 5 Key Differences Explained

Brachiosaurus and brontosaurus are both large herbivorous dinosaurs from the late Jurassic period.  They are often confused with one another. That's an easy mistake; they are both characterized by their… Read More

By Hannah Ward 3 days ago

8 Snakes That Don’t Bite, Usually

Some snakes don’t bite people…usually. It’s important to snake breeders that the snakes they propagate have easy-going temperaments. The most docile snakes are usually bred for those characteristics, just like… Read More

By Kristen Holder 3 days ago

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 3 days 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 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.