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.

Mar 24, 2025 · Below you’ll discover the complete list of animal names our researchers have written about so far. With thousands more domesticated and wild animal lists planned, our …

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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 …

May 26, 2023 · An animal is a complex, multicellular organism that belongs to the biological kingdom Animalia – the animal kingdom. Animals range from relatively simple organisms such …

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 …

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