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

Top 10 Ugliest Cats

Beauty, according to the novelist Margaret Wolfe Hungerford, might be in the eye of the beholder. But while all cat breeds have their fans and enthusiasts, some of them are… Read More

By Rebecca Bales 4 hours ago


The 18 Beautiful Cat Breeds with Blue Eyes

Newborn kittens have sweet, sparkling blue eyes, but as they get older, they develop melanin. This changes their bright blue eyes to other colors like gold, green, or brown. However,… Read More

By Kellianne Matthews 7 hours ago


Australian Shepherd vs Border Collie: 5 Key Differences Between These Loyal Pups

Have you ever wondered about the Australian Shepherd vs the Border Collie? Both of these breeds are working dogs that were originally used for herding farm animals. If you saw… Read More

By Heather Ross 11 hours ago

19 Breeds of Puppies That Don’t Grow Very Large

Puppies can be challenging. But their precious tiny faces make up for all the sleepless nights. It may have you wondering if there are dogs who always look like puppies,… Read More

By Niccoy Walker 12 hours ago


Bison vs Buffalo: 6 Key Differences

Are bison and buffalo the same? Well, when settlers first visited the new world and witnessed bison, they thought they looked like the Cape buffalo and water buffalo from other… Read More

By Heather Hall 12 hours ago


The 10 Least Intelligent Birds in the World

For the most part, people tend to pay attention to a bird's intelligence only when the bird is very smart. But what about dumb birds? You've heard that the ostrich… Read More

By Heather Ross 13 hours ago

The Largest Swordfish Ever Caught in Maryland

The world is full of records. There are always competitions all over to determine who or what is the best. When it comes to the world of fishing, there are… Read More

By Patrick MacFarland 13 hours ago


26 Black and White Birds (With Pictures of Each to Help You Identify Them!)

Black and white coloration is visually striking. A deep contrast in colors can draw the eye and make birds and other animals stand out. But sometimes, it helps them blend… Read More

By Niccoy Walker 13 hours ago


The 10 Strongest Cats (From Wild to Domestic!)

Although we don't think of cats as being buff, they can be surprisingly strong. The large cat breeds that are strong tend to be muscular for climbing trees and hunting… Read More

By Rebecca Bales 14 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 Airedale Terrier
Animals that Start with A

Example: The Airedale Terrier

A Brown Dog Tick
Animals that Start with B

Example: The Brown Dog Tick

A Common European Adder
Animals that Start with C

Example: The Common European Adder

A Dunkleosteus
Animals that Start with D

Example: The Dunkleosteus

A English Cocker Spaniel
Animals that Start with E

Example: The English Cocker Spaniel

A Frigatebird
Animals that Start with F

Example: The Frigatebird

A Gazelle
Animals that Start with G

Example: The Gazelle

A Hairy-footed Flower Bee
Animals that Start with H

Example: The Hairy-footed Flower Bee

A Indigo Snake
Animals that Start with I

Example: The Indigo Snake

A Jamaican Iguana
Animals that Start with J

Example: The Jamaican Iguana

A Kinkajou
Animals that Start with K

Example: The Kinkajou

A Largemouth Bass
Animals that Start with L

Example: The Largemouth Bass

A Minke Whale
Animals that Start with M

Example: The Minke Whale

A Night Heron
Animals that Start with N

Example: The Night Heron

A Pyrenean Shepherd
Animals that Start with P

Example: The Pyrenean Shepherd

A Quokka
Animals that Start with Q

Example: The Quokka

A Red-Bellied Woodpecker
Animals that Start with R

Example: The Red-Bellied Woodpecker

A Southern Pacific Rattlesnake
Animals that Start with S

Example: The Southern Pacific Rattlesnake

A Ten-Lined June Beetle
Animals that Start with T

Example: The Ten-Lined June Beetle

A Umbrellabird
Animals that Start with U

Example: The Umbrellabird

A Viper Boa
Animals that Start with V

Example: The Viper Boa

A Waterbuck
Animals that Start with W

Example: The Waterbuck

A Xiaosaurus
Animals that Start with X

Example: The Xiaosaurus

A Yellow Tanager (Black-and-Yellow Tanager)
Animals that Start with Y

Example: The Yellow Tanager (Black-and-Yellow Tanager)

A Zebrafish (Zebra Fish)
Animals that Start with Z

Example: The Zebrafish (Zebra Fish)

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!

Maine Coon vs Norwegian Forest Cat: Comparing These Giant Cat Breeds

Maine Coons and Norwegian Forest cats are both large, long-haired species of house cat. It’s easy to confuse these similar felines. Neither are fully grown until around sometimes 5 years… Read More

By Heather Ross 18 hours ago


The 12 Weirdest Dog Laws in the World

Many laws out there protect you and your pet, such as dogs needing leashes, no animal cruelty, and even certain bans on breeds. Whether or not you agree with these… Read More

By Nina Phillips 18 hours ago


Bear vs Lion: Our Take on Which Predator Would Win in a Fight

Bears and lions are known for being some of the fiercest predators on the face of the planet. Interestingly, they do not share a range. Lions primarily live in sub-Saharan… Read More

By Kyle Glatz 20 hours ago

Why Do Snakes Eat Themselves?

Quick Answer: Snakes eat themselves due to stress, temperature regulation issues, hypermetabolism, hunger, shedding, constrictive habitat, illness, or confusion. Scientists say that a snake may mistake its own tale for… Read More

By Rebecca Bales 22 hours ago


Mammoth vs. Elephant: Comparing These Two Behemoths

Elephants and mammoths are closely related animals, belonging to the same order: Elephantidae, which is part of a larger group called the Proboscidea . Of the three families in this… Read More

By Krishna Maxwell 22 hours ago


Beware of Tarantulas in These 13 States

Tarantulas are large arachnids that terrify some people, while others like to keep them as pets. They are most common in areas such as Mexico, Australia, Southern Asia, and Africa.… Read More

By Sharon Parry 23 hours ago

Do Male Lions Actually Hunt, Or Leave it To the Females?

When it comes to the question of whether or not male lions actually hunt, the answer is somewhat ambiguous. Lions, the pride of Africa, are a highly sexually dimorphic species.… Read More

By Brandi Allred 23 hours ago


10 Birds That Sing: The Most Beautiful Bird Songs in the World

Since prehistoric times, birds and their ability to fly has been a constant source of wonder for humans. Whether in cave paintings, fantasy fiction, or mythology and symbolism, birds have… Read More

By Lex Basu 23 hours ago


The 10 Smallest Wild Cats and Where You Can Find Them Around the World

Domesticated cats are some of the most popular pets in the world, but did you know about the range of small cats? We often think of huge beasts when we… Read More

By Rebecca Bales 23 hours ago

The 10 Fastest Fish in the Ocean

The animal kingdom is full of useful survival strategies, from poison to thick skin. But no matter the medium in which they move, including land, air, and even water, speed… Read More

By Krishna Maxwell 23 hours ago


What Animals Sweat? We Found 7 Different Ones

Sweat might be messy, smelly, and generally unappealing, but it is an important human phenomenon that helps to make us what we are. Perspiration is a cooling mechanism that kicks… Read More

By Emily Wolfel 23 hours ago


The 7 Cleanest Dog Breeds

Some dog breeds are simply cleaner than others. However, exactly what defines "clean" depends on who you ask. Some breeds are relatively low-maintenance and may not require as much brushing,… Read More

By Kristin Hitchcock 23 hours ago

The 15 Most Common Pests Damaging Tomato Plants

Tomatoes are rather easy to grow, especially in warmer climates. They can come back several years in a row and leave you with plenty of these delicious fruits over the… Read More

By Nina Phillips 1 day ago


American Shepherd vs. Australian Shepherd: 8 Differences Between These Similar Pups

What is there to discover about American shepherd vs. Australian shepherd? Interestingly, despite their names, both breeds originated in the United States. The American shepherd is more accurately known as… Read More

By Jennifer Gaeng 1 day ago


The 8 States Considered to Be in ‘Tornado Alley’

If you’ve ever been to the Central United States, you may have heard the term “Tornado Alley”. Tornado Alley isn’t actually a scientific term or even a specific place on… Read More

By Kellianne Matthews 1 day ago

Sea Monsters: A Complete Guide to 19 Mythical Creatures from A-Z

It is believed that there are many organisms in the lakes, oceans, and other deep bodies of water that make up our world. Some of these bodies of water are… Read More

By Em Casalena 1 day ago


The 10 Most Expensive Fish You Can Eat in 2024

Imagine sitting down at a restaurant and ordering a delicious fillet of fish, but when the waiter brings your check, you realize you have to take out a small loan… Read More

By Lev Baker 2 days ago


The Most Loyal Dog Breeds (Velcro Dogs!)

Known as the human’s best friend for a reason, many breeds of dogs are particularly loyal and loving. Whether you’re living the single life in the apartment world or countryside… Read More

By Sandy Porter 2 days ago

The Scariest Natural Disasters

In this fantastic world of ours, humans have experienced so many things. Climate change for one is a natural phenomenon that is mainly due to human development. Humans are the… Read More

By Patrick MacFarland 2 days ago


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 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.