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Discover Different Types of Animals Today

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, you’ll find it here!

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 or subscribe to our YouTube Channel. Also be sure to check out our growing list of Animal Quizzes and Web Stories.

Latest Animal News, Facts, Rankings, and More!

Elk vs Mule Deer: What Are The Differences?

Elk and mule deer are two of the larger members of the deer family across North America. While they both have many similarities, identifying one from the other isn't all… Read More

By Colby Maxwell 42 mins ago

10 Incredible African Wild Dog Facts

Also known as the African painted dog and Cape hunting dog, the African wild dog (Lycaon pictus) is a wild canine native to sub-Saharan Africa. It is the only living… Read More

By Jeremiah Wright 4 hours ago

10 Incredible Cougar Facts

Panther? Mountain lion? Puma? Cougar? They are all the same! The cougar (Felis concolor) is a large cat native to the Americas. Its range spans from northwest Canada to the… Read More

By Jeremiah Wright 4 hours ago

See all of A-Z Animals News and Information.

The 7 Major Different Types Of Animals

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.

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.

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.

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.

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.

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.

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!

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.

The Best Cat Food for Indoor Cats: Reviewed and Ranked

Embrace Pet Insurance Guide: Everything You Need to Know

JustFoodForDogs Review: Read Before You Buy

Prudent Pet Pet Insurance Review: Pros, Cons, and Coverage

Ultimate Guide To Pet Dental Insurance: What You Need to Know

Gentle Giants Dog Food: Reviewed

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

Animals that Start with A

Example: The Anole Lizard

Animals that Start with B

Example: The Bichpoo

Animals that Start with C

Example: The Cactus Moth

Animals that Start with D

Example: The Dragonfly

Animals that Start with E

Example: The Eel

Animals that Start with F

Example: The Freshwater Jellyfish

Animals that Start with G

Example: The Golden Shepherd

Animals that Start with H

Example: The Husky Jack

Animals that Start with I

Example: The Indian Elephant

Animals that Start with J

Example: The Javanese

Animals that Start with K

Example: The Kerry Blue Terrier

Animals that Start with L

Example: The Lizard

Animals that Start with M

Example: The Moth

Animals that Start with N

Example: The Nebelung

Animals that Start with O

Example: The Otter

Animals that Start with P

Example: The Peacock Spider

Animals that Start with Q

Example: The Queen snake

Animals that Start with R

Example: The Red-Lipped Batfish

Animals that Start with S

Example: The Stick Insect

Animals that Start with T

Example: The Texas Heeler

Animals that Start with U

Example: The Umbrellabird

Animals that Start with V

Example: The Vaquita

Animals that Start with W

Example: The West Highland Terrier

Animals that Start with X

Example: The X-Ray Tetra

Animals that Start with Y

Example: The Yoranian

Animals that Start with Z

Example: The Zebra Mussels

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 Habitats, Diet, Behavior and much more…