What is the largest division of the animal kingdom?

If you consider so broadly with the Animal Kingdom and figure out the largest division, it could perhaps be the Single-celled Protozoans. Their numbers are far exceeding any other or all other animals put together. read more

The largest division (or phylum) of the animal kingdom is Arthropoda, the arthropods. Arthropoda makes up 75% of all known animal species. Technically, arthropods are invertebrates with segmented bodies and limbs with joints. read more

Animals with backbones, like these zebras, are commonly referred to as vertebrates. Mammals, birds, fish, amphibians, and reptiles are all vertebrates. Zebras belong to the mammal order. Mammals, which also include humans, are the most complex animals in the animal kingdom. read more

Arthropod, any member of the phylum Arthropoda, the largest phylum in the animal kingdom, which includes such familiar forms as lobsters, crabs, spiders, mites, insects, centipedes, and millipedes. About 84 percent of all known species of animals are members of this phylum. read more