Dec 9, 2025 · Animal, any of a group of multicellular eukaryotic organisms thought to have evolved independently from the unicellular eukaryotes. Animals differ from other multicellular …

Animal body lengths range from 8.5 μm (0.00033 in) to 33.6 m (110 ft). They have complex ecologies and interactions with each other and their environments, forming intricate food webs.

Explore the animal kingdom through pictures, videos, facts, and more from our animal profiles on fish, birds, reptiles, mammals, amphibians, and invertebrates.

The world’s largest & most trusted collection of animal facts, pictures and more! Discover more than 1,000 new animals today!

From reptiles and amphibians to fish, birds and mammals, meet the animals at the Smithsonian's National Zoo and Conservation Biology Institute.

ANIMAL definition: any member of the kingdom Animalia, comprising multicellular organisms that have a well-defined shape and usually limited growth, can move voluntarily, actively acquire …

May 26, 2023 · Scroll down (or click the image above) to see a complete guide to animals and the animal kingdom. Find out: what makes an animal an animal; how animals are classified; …

Welcome to Animalia, an online animal encyclopedia where you can learn about all your favourite animals, and even some you may have never heard of.

Dec 31, 2024 · Explore the animal kingdom with detailed scientific guides, species characteristics, behaviors, habitats, and interactive resources for comprehensive learning and discovery

Although scientifically humans are animals, in everyday usage, animal often refers to any member of the animal kingdom that is not a human being, and sometimes excludes insects (although …