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Oct 22, 2023 · With thousands more domesticated and wild animal lists planned, our goal is to become the most comprehensive and thoroughly researched animal resource on the planet. Scroll down the page to see a complete list of every animal on A-Z Animals!
- African Civet
Small animals such as frogs, rodents, lizards, and snakes...
- Aardvark
Heather Hall is a writer at A-Z Animals, where her primary...
- African Jacana
View all 194 animals that start with A. Share on: How to Add...
- Amazon Tree Boa
These snakes fall prey to other carnivores; birds of prey...
- Amargasaurus
Similar Animals to The Amargasaurus. Other Sauropods related...
- African Civet
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Over 1.5 million living animal species have been described, of which around 1.05 million are insects, over 85,000 are molluscs, and around 65,000 are vertebrates. It has been estimated there are as many as 7.77 million animal species on Earth. Animal body lengths range from 8.5 μm (0.00033 in) to 33.6 m (110 ft).
- Overview
- The animal kingdom
Animals are multicellular eukaryotes whose cells are bound together by collagen. Animals dominate human conceptions of life on Earth because of their size, diversity, abundance, and mobility. The presence of muscles and mobility is one of the primary characteristics of the animal kingdom.
What are the two major groups of animals?
The two major groups of animals are vertebrates and invertebrates. Vertebrates have backbones, and invertebrates do not.
When did animals first appear?
Animals first appeared in the Ediacaran Period, about 635 million to 541 million years ago, as soft-bodied forms that left traces of their bodies in shallow-water sediments.
What are the basic functional systems of animals?
Animals evolved from unicellular eukaryotes. The presence of a nuclear membrane in eukaryotes permits separation of the two phases of protein synthesis: transcription (copying) of deoxyribonucleic acid (DNA) in the nucleus and translation (decoding) of the message into protein in the cytoplasm. Compared to the structure of the bacterial cell, this ...
Animals. Animal Pictures and Facts. Learn all you wanted to know about animals with pictures, videos, facts, news, and more. Composite photograph by Joel Sartore, National Geographic Photo...
Explore amazing facts, photos, and videos of your favorite animals with National Geographic Kids. Join the fun and learn more about the natural world.
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.
