Discover cute, wild, and weird animals using the search bar below, or scroll to see popular animal lists!
Search for Any Animal – Discover Amazing Creatures!
A-Z Animals is the world’s most trusted online animal encyclopedia. If you want cute animals, wild animals, 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 Types Of Animals
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.
Pet Guides: Everything To Know About Cat and Dog Breeds
Most Popular Pet Dog Breeds
See a complete list of dog breeds.
Most Popular Pet Cat Breeds
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 Animals from Around the World
- African Animals
- Asian Animals
- Central American Animals
- Eurasian Animals
- Stirling - 2013 for Honda Accord (NOTE: EX EX-L LX-S Sport) Fron
- North American Animals
- Marine (Ocean) Animals
- Oceanian Animals
- South American Animals
Animals By Letter: Explore A to Z Animal Lists
See Endangered Animals Lists
- Extinct in the Wild
- Critically Endangered
- Near Threatened
- Least Concern
- Data Deficient
- Not Evaluated
Animal Reference Guides
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:
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.
Mammals represent one of the most diverse groups of creatures within the animal kingdom, and it all comes down to their warm-blooded nature. Mammals can maintain higher body temperatures than reptiles and amphibians, and that provides them with higher metabolisms and the ability to generally be more active. The result is a series of evolutionary […] Read More
Rodents are found on every major continent, and they remain one of the most diverse and prolific groups of animals on the planet. It can be hard to keep track of which animals are rodents, but it can also be difficult to track which animals fall under the label of mammal as well. If you’ve […] Read More
Are Fish Mammals?
Fish are not mammals, but they are such a diverse group that putting all of them in one class, and they used to be grouped in the class Pisces, is inefficient. Instead, they are classified into three classes and an unlistable number of subclasses, clades, orders, suborders, tribes, superfamilies, families, genera, and species. This is […] Read More
New research was released on September 7th that had a shocking conclusion: animals are shape-shifting in response to climate change. The research comes from scientists at Deakin University in Australia and traces how 30 species have responded to rising climate temperates. Let’s dive into what “shape shifting” means and 3 animals that are changing in […] Read More
Birds are not mammals, but avians. Unlike mammals, they do not have fur or hair — instead, they have feathers, though sometimes they possess bristles on their heads or faces that resemble hair. They are not mammals even though they are warm-blooded, breathe air, and possess vertebrae, which are other mammalian characteristics. They’re not mammals […] Read More
Owls live in every part of the world except Antarctica and some remote islands. These large-eyed, nocturnal raptors are among the most mysterious, intriguing members of the animal kingdom. Are Owls mammals? Read on to find out. The ancient Greeks believed they were an omen of good luck. In their mythology, owls were the companion […] Read More
There are 8.7 million species on the planet, and that means that you and your cat are just one tiny bit of representation in a diverse milieu of life. We share common ancestry with chimpanzees, squid, and even single-celled organisms — so it only makes sense that we share ancestry with the cats that live […] Read More
Marsupials have evolved one of the most unique adaptations in the entire animal kingdom. These devoted mothers keep their offspring with them at all times, hidden away in an abdominal pouch. They are really like no other animals on the planet. Some of the most well-known marsupials include wombats, wallabies, koalas, bandicoots, opossums, kangaroos (as […] Read More
Sea urchins are spiny animals that live on the bottom of the sea. While sea urchins aren’t known to be nimble hunters — moving slowly on tube feet – their diet may surprise you. Let’s dig into what sea urchins eat and how this class of animals have managed to thrive for hundreds of millions […] Read More
Beautiful colors, markings, and features characterize these creatures during the four stages of their metamorphosis. The egg becomes a larva or caterpillar, then a pupal stage before the butterfly or moth emerges. We are looking at the larva or caterpillar stage, seeking the largest caterpillars in the world. Before we enjoy the beautiful varieties of […] Read More