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

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 49 mins 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 13 hours 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 13 hours 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 14 hours 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 15 hours 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 17 hours 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 18 hours 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 18 hours 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 19 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!

Mammals

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

Reptiles

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

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

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

Amphibians

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.

Invertebrates

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.

Insects

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 Alusky
Animals that Start with A

Example: The Alusky

A Bird Snake
Animals that Start with B

Example: The Bird Snake

A Crabeater Seal
Animals that Start with C

Example: The Crabeater Seal

A Dinosaurs
Animals that Start with D

Example: The Dinosaurs

A Eastern Indigo Snake
Animals that Start with E

Example: The Eastern Indigo Snake

A Forest Cobra
Animals that Start with F

Example: The Forest Cobra

A Gargoyle Gecko
Animals that Start with G

Example: The Gargoyle Gecko

A Horse Mackerel
Animals that Start with H

Example: The Horse Mackerel

A Immortal Jellyfish
Animals that Start with I

Example: The Immortal Jellyfish

A Japanese Chin
Animals that Start with J

Example: The Japanese Chin

A Kerry Blue Terrier
Animals that Start with K

Example: The Kerry Blue Terrier

A Labahoula
Animals that Start with L

Example: The Labahoula

A Mackenzie Valley Wolf
Animals that Start with M

Example: The Mackenzie Valley Wolf

A Northern Flicker
Animals that Start with N

Example: The Northern Flicker

A Oxpecker
Animals that Start with O

Example: The Oxpecker

A Pygmy Shark
Animals that Start with P

Example: The Pygmy Shark

A Quail
Animals that Start with Q

Example: The Quail

A Ragdoll
Animals that Start with R

Example: The Ragdoll

A Smallmouth Bass
Animals that Start with S

Example: The Smallmouth Bass

A Tenrec
Animals that Start with T

Example: The Tenrec

A Understanding the 5 Key Differences Between Male and Female Lions
Animals that Start with U

Example: The Understanding the 5 Key Differences Between Male and Female Lions

A Viper Shark (dogfish)
Animals that Start with V

Example: The Viper Shark (dogfish)

A Warthog
Animals that Start with W

Example: The Warthog

A Xiphactinus
Animals that Start with X

Example: The Xiphactinus

A Yellowjacket (Yellow Jacket)
Animals that Start with Y

Example: The Yellowjacket (Yellow Jacket)

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
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
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!

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 19 hours 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 19 hours 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 21 hours 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 22 hours 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 23 hours 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 1 day 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 1 day ago


Discover the Odd Ocean “Cafe” where Great White Sharks Gather

More than 70% of the planet is covered by ocean waters! According to the National Geographic Society, “More than 80 percent of the ocean has never been mapped, explored, or… Read More

By Cindy Rasmussen 1 day ago


10 Amazing Animals That Have Shells (It’s Not Just Turtles!)

A shell is an hard exterior or exoskeleton that can be used as a protective measure for a lot of animals without a vertebrae. There are many animals that have… Read More

By Lex Basu 1 day ago

Everything You’ve Ever Wanted to Know About Snake Eggs

Did you know there are about 4,000 species of snake living throughout the world? Certainly, snakes are interesting creatures to observe and study. Some snakes have an array of brightly… Read More

By Heather Hall 1 day ago


Types of Sharks: 25 Shark Species You Must Know!

How many types of sharks are there in the world? Can you name a species of shark belonging to each order? In the article below we'll examine the types of… Read More

By Heather Hall 1 day ago


The World’s 10 Largest Monkeys

Monkeys come in all shapes and sizes and exist around the world. Most monkeys live in Africa, Asia, Central America, and South America. While many hang from branches and leap… Read More

By Jesse Elop 2 days ago

The 9 Oldest Dog Breeds (One Might Be 10,000 Years Old!)

How old is the world's oldest dog breed? More specifically--what was the first dog on earth? The answer isn't quite as clear-cut as we'd like. While some research has pointed… Read More

By Michelle Stacy 2 days ago


10 Incredible Great White Shark Facts

There’s nothing quite like seeing a the tip of a large shark fin skimming the surface of the water to send shivers down your spine. Great White Sharks in particular… Read More

By Kellianne Matthews 2 days ago


17 Incredibly Old Buildings People Still Use to This Day

Throughout history, people built many beautiful buildings and subsequently destroyed them due to lack of care, wars, and to reuse the materials. Additionally, some buildings were just not able to… Read More

By Nina Phillips 2 days ago

Bobcat vs Lynx: The 4 Key Differences Explained

Expert climbers, deadly predators, and dotting parents: the bobcat is an iconic piece of American wildlife. Sporting unique ear tufts and long cheek hairs, these medium-sized wild cats are easy… Read More

By Heather Ross 2 days ago


The 15 Best Small Dog Breeds – Our Top Picks, Ranked!

Whether you’re looking for a first-time companion or another furry friend to add to your family, a small dog might be the right choice. Dogs come in all colors, temperaments,… Read More

By Brandi Allred 2 days ago


Meet the Mapogo Coalition – The World’s Deadliest Lions (Reigned Over an Empire!)

Lions are very capable apex predators that can hunt and kill most things that live in their range. They also have an interesting social structure that lends itself to infighting… Read More

By Kyle Glatz 2 days ago

10 Deep Sea Creatures: Discover the Rarest Scariest Animals Beneath the Seas!

There’s no doubt that deep-sea creatures are the stuff of nightmares. The truth is, though, that these astounding creatures are widely misunderstood. For example, many of the terrifying features that… Read More

By Sadie Dunlap 2 days ago


Hawk vs Eagle: 6 Key Differences Explained

Look at that bird in the sky! Is it a hawk? Is it an eagle? If this sounds like you, don’t worry. Many people struggle to tell the differences between… Read More

By Patrick Sather 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.