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

Shih Tzu vs Maltese: Comparing These Loveable Breeds to Help You Choose

The Maltese and Shih Tzu are two little purebred companion dogs that are incredibly popular. What, though, makes these two dogs distinct? The Shih Tzu, for example, is Chinese in… Read More

By Jennifer Gaeng 10 hours ago

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

The biggest, the strongest, the longest lifespan - we love learning about G.O.A.T.s (greatest of all time) of the natural world, and not just the furry mammalian kind. But what… Read More

By Rebecca Bales 12 hours ago

Hate Shedding? Here Are 10 Large Dogs That Don’t Shed (A Lot)

Cleaning up clumps of dog hair is a task the majority of dog owners detest. It is a time-consuming, continuous process and can cause allergic reactions in certain people. Unfortunately,… Read More

By Abdulmumin Akinde 13 hours ago

Trout vs. Salmon: The Key Differences Explained

If you're looking for a delicious, healthy meal for dinner, two fish that might come to mind are trout and salmon. Trouts and salmon are closely related but have key… Read More

By Rebecca Bales 13 hours ago

Animals of the Zodiac by Astrological Sign

A constellation is a grouping of stars that exhibits a recurring pattern. Based on the night sky's many constellations, astrology has been interpreted in many ways by cultures across the… Read More

By Jennifer Gaeng 14 hours ago

The 6 Best Hypoallergenic Dog Breeds for Families with Kids

For the majority of the past two decades, the number of households that own dogs has steadily increased. Dogs are the most common pet to own with over 65 million… Read More

By Liz O’Connell 15 hours ago

9 Non-Venomous Snakes in the World

First things first. Snakes are not poisonous, they are venomous. They are also some of the most feared creatures in the animal kingdom, but depending on where you live, you’re… Read More

By Heather Ross 15 hours ago

Roman Rottweiler vs. German Rottweiler: 8 Differences

What distinguishes the Roman Rottweiler from the German Rottweiler? Is it the same dog? In short, the “Roman” Rottweiler is bred to be larger and heavier than the Rottweiler breed… Read More

By Jennifer Gaeng 16 hours ago

Lilac French Bulldog vs. Blue French Bulldog: What Are 8 Key Differences?

There are many different hues of French bulldogs; however, there are two noteworthy colors that seem to grab the hearts of those who catch a glimpse: lilac and blue. When… Read More

By Jennifer Gaeng 16 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 Australian Labradoodle
Animals that Start with A

Example: The Australian Labradoodle

A Blister Beetle
Animals that Start with B

Example: The Blister Beetle

A Common Furniture Beetle
Animals that Start with C

Example: The Common Furniture Beetle

A Darwin’s Frog
Animals that Start with D

Example: The Darwin’s Frog

A Eastern Woodrat
Animals that Start with E

Example: The Eastern Woodrat

A Fiddler Crab
Animals that Start with F

Example: The Fiddler Crab

A Gorilla
Animals that Start with G

Example: The Gorilla

A Horned Beetle
Animals that Start with H

Example: The Horned Beetle

A Insect
Animals that Start with I

Example: The Insect

A Junglefowl
Animals that Start with J

Example: The Junglefowl

A Kodkod
Animals that Start with K

Example: The Kodkod

A Lake Trout
Animals that Start with L

Example: The Lake Trout

A Madagascar Tree Boa
Animals that Start with M

Example: The Madagascar Tree Boa

A Neanderthal
Animals that Start with N

Example: The Neanderthal

A Old House Borer
Animals that Start with O

Example: The Old House Borer

A Paddlefish
Animals that Start with P

Example: The Paddlefish

A Quetzalcoatlus northropi
Animals that Start with Q

Example: The Quetzalcoatlus northropi

A Russian Bear Dog
Animals that Start with R

Example: The Russian Bear Dog

A Swallow
Animals that Start with S

Example: The Swallow

A Tundra Swan
Animals that Start with T

Example: The Tundra Swan

A Uromastyx (Spiny-Tailed Lizard)
Animals that Start with U

Example: The Uromastyx (Spiny-Tailed Lizard)

A Vole
Animals that Start with V

Example: The Vole

A Weaver Bird
Animals that Start with W

Example: The Weaver Bird

A Xiaosaurus
Animals that Start with X

Example: The Xiaosaurus

A Yellow Sac Spider
Animals that Start with Y

Example: The Yellow Sac Spider

A Zebu
Animals that Start with Z

Example: The Zebu

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!

10 Animals That Glow In The Dark

The animal kingdom is full of fascinating organisms that have the ability to glow. Most people know about the humble firefly, but the vast majority of glowing animals actually lurk… Read More

By Rebecca Bales 16 hours ago

The Most Common Places to Find Monkeys Around the World

Monkey locations tend towards tropical and sub-tropical regions where they can swing across the branches of trees in forests, and although many species prefer to live in the wild, others… Read More

By Janet F. Murray 17 hours ago

Great White Shark vs Giant Squid: Which Ocean Behemoth Is More Formidable?

Sharks and squids are two oceanic species that have captured the attention of humankind. Both creatures have had a storied history originating from various civilizations, and the conception of monsters… Read More

By Taiwo Victor 18 hours ago

9 Most Beautiful Monkeys and Where You Can Catch a Glimpse of Them

We all know that monkeys are cute. But did you know that some truly beautiful monkey species are out there? From the incredibly colorful mandrills to the regal lion tamarins,… Read More

By Janet F. Murray 20 hours ago

Jaguar vs Panther: 6 Key Differences Between These Stealthy Cats

Panthers and jaguars are often confused with one another and it's an easy mistake to make as the term “panther” is often used to describe several different species.  The truth… Read More

By Hannah Ward 24 hours ago

Chipmunk vs Squirrel: 7 Main Differences Between These Critters Explained

Chipmunks and squirrels are members of the Sciuridae family. Furthermore, they look and act a lot alike. But there are several differences between these two rodents. For one, squirrels are… Read More

By Heather Hall 1 day ago

7 Types of Ruminant Animals With Pictures

Have you ever heard of ruminant animals? If you have livestock, you probably already know that ruminant animals include cattle and sheep. The phrase describes a sizable group of herbivores… Read More

By Em Casalena 1 day ago

German Shepherd Vs. Pit Bull: 6 Key Differences Explained

Right off the bat, German shepherds and pit bulls are pretty different. From physical features to their lineage, these two dog breeds would appeal to diverse owners. However, they do… Read More

By Kaleigh Moore 2 days ago

The 7 Best Sharks to Keep as Pets

If you are a fish lover, you may have thought about getting a shark to keep as a pet. Although you may not be able to keep a great white… Read More

By Lev Baker 2 days ago

Mountain Lion vs Wolf: Which Forest Predator Is More Fearsome?

Massive felines and canines share ranges and battle one another all the time. Sometimes the big cat gets the upper hand, and other times groups of canines bring them down.… Read More

By Kyle Glatz 2 days ago

8 Smallest Sharks Swimming in the Oceans Today

You've all heard of the massive sharks of the world and oceans past. The megalodon, the great white shark, and the whale shark get most of the attention, but did… Read More

By Emily Wolfel 2 days ago

The Top 10 Scariest Animals Still Living on Planet Earth Today

While many animals in the world are sweet and cuddly, running into others is very dangerous. These animals are the most aggressive in the world. Therefore, they are terrifying enough… Read More

By Rebecca Bales 2 days ago

Our Top 10 Picks for Best Pet Snakes in 2024

Choosing a pet snake is very different from other livestock and companion animals. It's a tricky and potentially risky process. The creatures have unique care requirements and husbandry. You need… Read More

By Heather Hall 2 days ago

Snake Population by State in 2024: Which State Has the Most Species?

Snakes are found all over the United States. But how does the snake population by state break down? In this roundup, we’ve listed the number of snake species you can… Read More

By Heather Hall 2 days ago

The 20 Animals with the Strongest and Best Sense of Smell

Smell is a critically important sense for many animals. It may help them hunt or forage for food, find a mate, keep safe from danger, communicate with others, and more.… Read More

By E. E. Gonzalez 2 days ago

The 10 Smelliest Animals in the World

What are the ten smelliest animals in the world? Which animals will make your olfactory system weep? We've considered all the candidates and finally came up with a list. So… Read More

By Heather Hall 2 days ago

Falcon vs. Hawk: 8 Main Differences Explained

Hawks and falcons are both birds of prey. However, you may likely have heard people using the names interchangeably. The reality is that they are two different species of birds.… Read More

By Rebecca Bales 2 days ago

The 10 Dogs With The Highest Bite Force – Are They Safe Pets?

It makes sense that natural selection would favor powerful jaws that can more easily disable even large prey, but human interest has also had a significant part to play in… Read More

By Rebecca Bales 2 days ago

The 12 Dog Breeds Fierce Enough to Kill Snakes

Do you have ophidiophobia? If you do and you want to prevent any slightly dangerous meetings with a snake, then you might be looking into all the possible ways to… Read More

By Jeremiah Wright 2 days ago

The Bite Force of a Lion and How It Compares to Other Big Cats

Lions are one of the world’s most beloved big cats. To many, lions are the King of the Jungle and are a dominant species with a powerful presence. Lions are… Read More

By Emilio Brown 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.