Discover, Appreciate, & Understand the Animal World!
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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
The 6 Most Common Languages Spoken in the United States
Key Points Sixty-eight million people in the United States speak a language at home other than English. The most common language spoken in the U.S. is English. All the most… Read More
By Eliana Riley 11 mins ago
Neptune is Not the Color You Think: Astronomers Reveal Photographic Error
What color are the planets of our solar system? Most images you've seen of them are color-enhanced to bring out specific details. But what would they look like to the… Read More
By Drew Wood 22 mins ago
Discover the Largest House in Connecticut And Just How Big 50,000 Square Feet Really Is
Nestled in the beautiful New England region of the United States, Connecticut is filled with rich history, charming towns, and a lovely coastline. The state is home to diverse architecture,… Read More
By Kellianne Matthews 1 hour ago
This Fox Picks on the Wrong Duck – And Leaves the Pond Hungry
You’ll have heard of the phrase ‘like a sitting duck’ – these ducks were the opposite of that! This pair of duck parents went on the offensive to scare off… Read More
By Sharon Parry 6 hours ago
Think Twice Before Filling Up in Your Tank in These 7 Maryland Cities With Crazy High Gas Prices
Gas prices are always a concern for Americans. Back in the 1980s, we would see gas prices of nearly a dollar. Now, gas prices can be anywhere between $2 to… Read More
By Patrick MacFarland 7 hours ago
Discover The World’s Largest Wooden Trestle Bridge
Trestle bridges aren't used much anymore, but they are still impressive feats of engineering, as you will see with the world's largest trestle bridge below. Bridges are interesting and amazing… Read More
By Nina Phillips 7 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:
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.
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 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, 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.
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.
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.
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.
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.
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.
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
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 5 Highest Bridges in Hawaii Are Towering Mammoths
Hawaii has plenty of epic views and sweeping vistas of the Pacific, the mountains that make up the islands, and the lush, tropical landscape. Some of the best places to… Read More
By Katie Melynn Wood 7 hours ago
Polite Cats Display Perfect Manners Sharing a Meal
At first viewing, this looks like a remarkable display of feline manners. However, there is probably a bit more to this clip. The footage has likely been played backward so… Read More
By Sharon Parry 9 hours ago
The Top 6 Longest Bridges Across the State of New York
People from around the world know that New York is home to some of the most iconic landmarks globally. However, only a few people know that the bridges in this… Read More
By Alanna Davis 10 hours ago
Wolves in Washington State: Where They Live, Risk to Humans, and Diet
Wolves are powerful apex predators that live in packs with a fascinating social hierarchy. Despite being widespread in the past, wolves were extirpated from many areas. They now inhabit thirteen… Read More
By Hannah Ward 11 hours ago
11 Michigan Cryptids: Appearance, Behavior, and Location
To the wary, Michigan cryptids lurk just around the corner. A shadow merging into the mist, footprints that appear human but are much, much too large — these traces of… Read More
By Asia Mayfield 12 hours ago
Male vs Female Miniature Schnauzers: 4 Key Differences
All dogs are unique, regardless of whether they are male or female, especially if neutered at an early age through castration or spaying. This includes in terms of behavior, size,… Read More
By Megan Martin 12 hours ago
Venus Trine Aspects for Each Planet in the Natal Astrology Chart
When planets are trine to each other in a natal astrology chart, that means that the energy is harmoniously flowing in between the two bodies. When Venus trines another planet,… Read More
By Dayva Segal 14 hours ago
This Black Sand Beach Will Make You Feel Like You’re On Another Planet
When you think of beaches, you probably think of brilliant golden sand, or even a rocky shore, depending on where you came from. The prettiest beaches are full of stunning… Read More
By Nina Phillips 14 hours ago
War Dogs! How Have Dogs Served in the Military, Past and Present?
Wars affect not only human beings but animals as well. Not only do they disrupt natural habitats, but throughout history, animals have actually fought in wars. Horses, camels, elephants, pigeons,… Read More
By Drew Wood 21 hours ago
Discover Achilles: The Legendary Greek Hero with an Unfortunate Ankle
Unmatched in valor, strength, and prowess in battle, Achilles is one of the most legendary figures in Ancient Greek mythology and literature. His decision to seek immortal fame in exchange… Read More
By Kellianne Matthews 23 hours ago
Where Is New Hampshire? See Its Map Location and Surrounding States
Located in the heart of New England, New Hampshire is known for its quaint, picturesque towns and its expansive wild beauty. It's no wonder, then, that one of the top… Read More
By Tina Page 1 day ago
Portuguese Water Dog Colors: Rarest to Most Common
The Portuguese Water Dog is an athletic, active, and eager dog. The breed is extremely intelligent and trainable. It was even the dog of choice for former President Barack Obama… Read More
By Jennifer Magid 1 day ago
The Top 9 Benefits for Americans Retiring in New Zealand
Located in the Southern Hemisphere amid the Pacific Ocean is the beautiful and unique country of New Zealand. Known for its friendly people, stunning natural beauty, outdoor recreation, and high quality… Read More
By Jennifer Geer 1 day ago
The 20 Most Fun and Interesting Massachusetts Facts You Didn’t Know
As the sixth oldest state in the United States, Massachusetts has an incredibly rich history filled with fun facts! Below, we’ll take a look at 20 fascinating facts and tidbits… Read More
By Hailey Pruett 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.
Animal Encyclopedia With Facts, Pictures, Definitions, 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:
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.