The 7 Main Types of Animals And Their Characteristics


Mammals are vertebrates that belong to the class Mammalia. They contain three middle ear bones, hair, mammary glands, and a neocortex, or higher brain functions.


The class Aves includes birds, which have feathers, toothless, beaked jaws, hard-shelled eggs, a four-chambered heart, and a strong, lightweight skeleton.


The class Reptilia includes animals with four legs, or tetrapods, such as reptiles. The are various kinds of reptiles found in the animal kingdom as well as their traits.


Invertebrate animals belonging to the Mollusca class are known as mollusks in the animal realm. Currently, over 85,000 different species of mollusks are identified and categorized correctly.


Marine organisms that belong to the class Echinodermata are called echinoderms. Every adult echinoderm, including sea stars, has radial symmetry.


Within the class Insecta, insects make up the biggest group of six-limbed (also known as hexapod) invertebrates.


Within the class Crustacea, the huge and diverse group of arthropods with segmented bodies and jointed limbs are known as crustaceans.