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

10 Most Beautiful Birds and Where You Can Find Them Around the World

There are so many beautiful birds on this planet that a list of 100, much less 10 couldn’t do justice to all of them. That being said, the criteria for… Read More

By Heather Hall 1 hour ago


The 10 Smallest Snakes in the World (Some Look Like Tiny Worms!)

Snakes have always fascinated human beings for all sorts of reasons, including their lack of limbs, their cold-bloodedness, and the fact that some of them wield venom powerful enough to… Read More

By Rebecca Bales 2 hours ago


The 10 Fastest Birds Soaring Today’s Skies

For thousands of years, people all over the world have been fascinated with the flight and motion of birds. It was often seen as a symbol of liberation, escape, or… Read More

By Heather Hall 2 hours ago

Tortoiseshell Cat vs. Calico: 3 Key Differences Between These Popular Breeds

When it comes to getting a cat, it’s important to know a bit about the breed you’re getting. Cats are differentiated by color, coat, personality, and much more. If you’re… Read More

By Jaydee Williams 2 hours ago


Jaguar vs Lion: Which Powerful Cat Would Win in a Fight?

Jaguars and lions are both deadly felines. The jaguar stalks the forests of South America while lions hunt in prides on the savannah in sub-Saharan Africa. With such fierce creatures… Read More

By Kyle Glatz 3 hours ago


The Largest Great White Sharks Ever Found Off Virginia Waters

Great white sharks are fascinating animals. They've been the focus of many stories, movies, and television shows. Although these large predators are labeled as aggressive and blood-thirsty, this isn't the… Read More

By Nixza Gonzalez 3 hours ago

Cute but Costly! The Top 10 Most Expensive Small Dog Breeds

For those who love small dogs, the search for the perfect breed can be an exciting adventure. However, some small dog breeds come with a hefty price tag that may… Read More

By Lev Baker 3 hours ago


Food Aggression in Cats: What Causes It and Our Top Tips for Stopping It

Food aggression in cats is a fairly common and specific type of cat behavior that is probably related to anxiety. The aggression can be directed toward other cats, other pets,… Read More

By Sharon Parry 4 hours ago


Bernedoodle vs Goldendoodle: Which Breed Is the Better Fit for You?

If you’re looking to adopt a new dog, you may be trying to decide between a Bernedoodle and a Goldendoodle. Both of these breeds are Poodle mixes and share some… Read More

By Heather Hall 4 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 Arctotherium
Animals that Start with A

Example: The Arctotherium

A Barbut’s Cuckoo Bumblebee
Animals that Start with B

Example: The Barbut’s Cuckoo Bumblebee

A Coton de Tulear
Animals that Start with C

Example: The Coton de Tulear

A Dalmatian Mix
Animals that Start with D

Example: The Dalmatian Mix

A Elephant Shrew
Animals that Start with E

Example: The Elephant Shrew

A Flycatcher
Animals that Start with F

Example: The Flycatcher

A Golden-Crowned Flying Fox
Animals that Start with G

Example: The Golden-Crowned Flying Fox

A Highland Cattle
Animals that Start with H

Example: The Highland Cattle

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 Korean Jindo
Animals that Start with K

Example: The Korean Jindo

A Linnet
Animals that Start with L

Example: The Linnet

A Mandrill
Animals that Start with M

Example: The Mandrill

A Northern Flicker
Animals that Start with N

Example: The Northern Flicker

A Oranda Goldfish
Animals that Start with O

Example: The Oranda Goldfish

A Parakeet
Animals that Start with P

Example: The Parakeet

A Quahog Clam
Animals that Start with Q

Example: The Quahog Clam

A Rainbow Boa
Animals that Start with R

Example: The Rainbow Boa

A Stingray
Animals that Start with S

Example: The Stingray

A Tiger snake
Animals that Start with T

Example: The Tiger snake

A Urial
Animals that Start with U

Example: The Urial

A Viper
Animals that Start with V

Example: The Viper

A Welsh Springer Spaniel
Animals that Start with W

Example: The Welsh Springer Spaniel

A Xiongguanlong
Animals that Start with X

Example: The Xiongguanlong

A Yoranian
Animals that Start with Y

Example: The Yoranian

A Zebra Mussels
Animals that Start with Z

Example: The Zebra Mussels

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!

The Fastest Animals in the World (Faster Than a Ferrari!?)

What is the fastest animal in the world? The answer isn't straightforward. The Earth isn't just made up of landmass. All the different environments need consideration along with the many… Read More

By Lex Basu 4 hours ago


6 Popular Small Dog Breeds That Don’t Shed or Bark (Much)

Dogs are known as a man’s best friend, but would a friend leave hair all over your furniture and yell every time a package is delivered to your home? Shedding… Read More

By Drew Wood 5 hours ago


The 20 Worst Dog Breeds to Have With Cats

There is a common misconception that cats do not get along with dogs, but this is not always true. In fact, cats and dogs can become the best of friends… Read More

By Lev Baker 5 hours ago

The 10 Most Harmless Animals In The World

Some animals are truly terrifying, and we have good reasons to keep a respectful distance from them. Nobody wants to tangle with a crocodile, shark, or coyote, but are there… Read More

By Krishna Maxwell 7 hours ago


The Best Wildflowers to Plant in all 50 States

Wildflowers are found across all 50 states. When planting a garden, or filling a field with stunning flowers, it's best to use flowers native to the area. This prevents any… Read More

By Nina Phillips 7 hours ago


12 Lovable and Popular Short-Haired, Big Dog Breeds

When it comes to finding the perfect furry friend to add to your family, big dogs have a special charm and presence that captures our hearts. Their gentle demeanor, loyalty,… Read More

By Lev Baker 7 hours ago

American Bully vs. Pit Bull: 7 Key Differences

Pit bulls and American bullies are dog breeds that have attracted significant attention and controversy. Although the pit bull and the American bully may share a resemblance in their looks,… Read More

By Lev Baker 9 hours ago


Discover 15 Different Animals That Can, and Have Eaten Humans

A “man-eater” is an animal that regularly attacks and devours humans. This does not include consuming a human that the animal has killed due to feeling threatened or attacked first,… Read More

By Jennifer Gaeng 9 hours ago


Ranking Our 10 Best Animals to Keep as Pets in 2024

There are many benefits to owning pets. Whether you hope to teach your children responsibility, are looking for companionship, anxiety relief, or seeking out a new hobby, owning a pet… Read More

By Heather Hall 10 hours ago

260 Exotic and Unique Female Dog Names

Welcome to a list of exotic and unique female dog names! Finding the perfect name for your furry companion can be a delightful yet challenging task. In this article, we… Read More

By Heather Hall 10 hours ago


The 9 Most Interesting Animals in the World

Every animal is interesting, but some animals are more interesting than others. The fascination may come from the way the animal looks, behaves, reproduces, or a combination of some or… Read More

By Rebecca Bales 12 hours ago


Discover the 25 Most Popular Large, White Dog Breeds

No animal is nearly as striking as a large white dog. These majestic canines capture the attention of nearly everyone who sees them. From the jovial and fluffy Samoyed to… Read More

By Kellianne Matthews 1 day ago

Mimicry Animals: 10 Animals That Use Mimicry to Survive

Mimicry means the act of imitation, but in the animal world, it is defined as “the close external resemblance of an animal… to another animal, plant, or inanimate object.” Animals… Read More

By Krishna Maxwell 1 day ago


The 12 Most Popular Tall and Skinny Dog Breeds in 2024

Dogs are great friends. They are active, sweet, charming, and have unique personalities. Did you know there are over 200 dog breeds in the world? Technically, this number is up… Read More

By Nixza Gonzalez 1 day ago


Emu vs. Ostrich: 9 Key Differences Between These Giant Birds

Emus and ostriches are both flightless birds belonging to the family ratite. They are the largest living flightless birds, similar in appearance, and thus are often confused. Both have large… Read More

By Lex Basu 1 day ago

Wild Boar vs Pig: Understanding the Key Differences (and Similarities)

Did you know that all wild boars are pigs, but not all pigs are wild boars? Yes, that has a little confusing ring, but it only means that the wild… Read More

By Taiwo Victor 1 day ago


Belgian Malinois vs German Shepherd: The 6 Main Differences Explained

The Belgian Malinois and the German Shepherd have been confused for far too long. Despite their history as herding dogs and their similar coloring, so many physical and behavioral differences… Read More

By Rebecca Bales 1 day ago


The Top 8 Slowest Animals in the World

You’ve probably heard that the cheetah, capable of running up to 70 miles an hour, is the fastest land animal. But do you know what the slowest animals in the… Read More

By Rebecca Bales 1 day ago

5 Incredible Dogs That Were Bred to Hunt Bears

Bear hunting dogs are used to track and trail bears. They must be able to identify the right bear scent and follow it until they find the bear. Some dogs… Read More

By Marisa Wilson 1 day ago


7 Reasons Your Dog Keeps Licking Their Butt

To me, there are few grosser sounds than a dog licking its butt! It’s even worse when they won’t stop, and you may begin to worry about their health. You… Read More

By Katelynn Sobus 1 day 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.