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.

Dec 9, 2025 · animal, (kingdom Animalia), any of a group of multicellular eukaryotic organisms (i.e., as distinct from bacteria, their deoxyribonucleic acid, or DNA, is contained in a membrane …

Learn about some of nature’s most incredible species through recent discoveries and groundbreaking studies on animal habitats, behaviors, and unique adaptations.

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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 …

We do not adopt to people under 21 years of age. Residency: The owner of the home must consent to the adoption of the animal. If you rent, we require a copy of your lease stating that …

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 9, 2025 · A characteristic of members of the animal kingdom is the presence of muscles and the mobility they afford. Mobility is an important influence on how an organism obtains …

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