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Search – Discover Different Types of Animals

A-Z Animals is the world’s most trusted online animal encyclopedia. If you want cute animals, types of wild animals, exotic pets, weird animals or are looking for comprehensive pet guides for dogs and cats, we’ve got you covered!

We believe that if people know more about the world’s creatures they will better care for them. Thats why we add new animals for you to discover – each and every day! Learn about any animal using the search box below:

The 7 Major Different Types Of Animals

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.

Pet Guides: Everything To Know About Cat and Dog Breeds

Want to know how to raise a puppy or kitten? Curious to learn more about big and small dog breeds or cat breeds? Check out our comprehensive pets guides below!

A Irish Setter
Irish Setter

Can live for up to 16 years!

A Boston Terrier
Boston Terrier

Friendly, lovable and very strong!

A Golden Retriever
Golden Retriever

Trusting, kind and gentle!

See a complete list of dog breeds.

A Abyssinian

The oldest breed of cat in the world!

A Australian Mist
Australian Mist

First bred in the 1700s!

A Ragdoll

One of the larger breeds of domestic cat!

See a complete list of cat breeds.

Expert Pet Product Reviews

The AZ Animals team has spent years working with and studying the latest research on what products are best for our pets and yours, and we’re excited to share our expert pet product recommendations with you.

See all of our Expert Pet Product Reviews.

Explore Types of Wild Animals from Around the World

Animals By Letter: Explore A to Z Animal Lists

A African Palm Civet
Animals that Start with A

Example: The African Palm Civet

A Black Marlin
Animals that Start with B

Example: The Black Marlin

A Cavapoo
Animals that Start with C

Example: The Cavapoo

A Discus
Animals that Start with D

Example: The Discus

A English Pointer
Animals that Start with E

Example: The English Pointer

A Flying Fish
Animals that Start with F

Example: The Flying Fish

A Giant Salamander
Animals that Start with G

Example: The Giant Salamander

A Human
Animals that Start with H

Example: The Human

A Indochinese Tiger
Animals that Start with I

Example: The Indochinese Tiger

A Jack Russell
Animals that Start with J

Example: The Jack Russell

A Kerry Blue Terrier
Animals that Start with K

Example: The Kerry Blue Terrier

A Lemur
Animals that Start with L

Example: The Lemur

A Manta Ray
Animals that Start with M

Example: The Manta Ray

A Newfoundland
Animals that Start with N

Example: The Newfoundland

A Otterhound
Animals that Start with O

Example: The Otterhound

A Porcupine
Animals that Start with P

Example: The Porcupine

A Quail
Animals that Start with Q

Example: The Quail

A Reindeer
Animals that Start with R

Example: The Reindeer

A Salmon
Animals that Start with S

Example: The Salmon

A Tiger
Animals that Start with T

Example: The Tiger

A Utonagan
Animals that Start with U

Example: The Utonagan

A Vampire Bat
Animals that Start with V

Example: The Vampire Bat

A Woolly Mammoth
Animals that Start with W

Example: The Woolly Mammoth

A Xerus
Animals that Start with X

Example: The Xerus

A Yellow Sac Spider
Animals that Start with Y

Example: The Yellow Sac Spider

A Zebra Pleco
Animals that Start with Z

Example: The Zebra Pleco

See Endangered Animals Lists

Animal Reference Guides

We are building the world’s greatest animal encyclopedia. Be search to check out our Reference Library and Glossary to learn about Animal HabitatsDietBehavior and much more…

Animals – Facts, Pictures and Resources 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.

There are many rare birds in North America, and it’s exciting for birders who catch glimpses of these elusive birds. Many rare birds are endangered, and conservation efforts are critical. After all, we don’t want to lose them. A focus on them, however, can make us forget the many wonderful birds we take for granted. […] Read More

You have heard the phrase “A dosage so strong it could kill an elephant.” But is anything similarly true in the wild world of nature? It turns out, yes —when it comes to animals, there are some that can kill an elephant. Read on to learn more about the animals that can attack and defeat […] Read More

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 beautiful birds for this blog had to be rather strict. First, the bird has to have good proportions. The exotic red feathers of the scarlet […] Read More

Snails are a fascinating and surprisingly diverse group of animals with over 43,000 known species and more being discovered all the time. A snail, technically speaking, is categorized as any gastropod mollusk that happens to have a shell. But what do snails eat, anyway? Additionally, how do they eat? From land snails to sea and […] Read More

Megalodons were absolutely massive sharks, but just how big were they? We’ve compiled the 13 most mind-blowing facts about megalodon. Don’t worry though, you’ll be able to get back in the water as the species is long since extinct. Let’s dive into our top megalodon facts! 1. Megalodons Are Possibly the Largest Shark/Fish That Ever […] Read More

If I had just settled in to watch a movie in my living room and a squirrel scooted out from under the drapes and ran across the floor I would be startled! If that same squirrel scooted across the street in front of me when I was out walking my dog I probably wouldn’t blink. […] Read More

“Don’t be a big baby!” Sounds like an insult, but in the case of baby elephants, it can actually be a compliment.The average (human) baby boy born in America weighs 7.5 lbs (boys typically weigh a little more than girls). Baby elephants are much larger. Let’s dive into how much baby elephants weigh. How Much […] Read More

Elephant babies are BIG babies! The average elephant baby is 200lbs at birth. That is about the same size as a grown man. The babies are born after a long gestation, the longest of all mammals, 18-22 months and can stand up within an hour of being born. They have to be able to stand […] Read More

Baseball players may have superstitions about shaving based on batting averages and winning streaks. Some players have even been known to shave off their ‘stache mid-game for good luck! But besides increasing the chances the Yankees will win, why do humans have hair? Humans are the only mammal that has hair on their heads but […] Read More

One of the most common snakes throughout much of North and Central America, the garter snake is a member of the Colubridae family. Colubridae is the largest family of snakes, with roughly 1,700 species. Most Colubrids either have very weak venom or are entirely non-venomous, so they are considered mostly harmless to humans. So, what […] Read More