From the biological classification perspective, animals belong to the kingdom called Animalia. They are eukaryotes and multi-cellular living organisms. Animals are locomotive (i.e., ability to move around), heterotrophic (i.e., consume organic material as a source of food), and reproduce sexually (with the exceptions of asexual organisms). The study of animals is called Zoology.
Types of Animals
Vertebrates
.Animals with a backbone, including mammals, birds, fish, reptiles, and amphibians. Vertebrates are characterized by their complex nervous systems and internal skeletons.
Invertebrates
Animals without a backbone, comprising a vast array of species such as insects, worms, arthropods, sponges, and mollusks. Invertebrates are the most numerous and diverse group of animals, making up about 95% of all animal species.
Classification of Vertebrates Animals
Birds
Fish
Reptiles
Mammals
Amphibians
Classification of Invertebrates Animals
Insects
Crustaceans
Arachnids
Echinoderms
Sponges
