If we talk about the animals then the first name that comes in the list is Man. There are various categories of animals like Birds, Insects, Snakes and mammals. They all need water, food and shelter for their continued existence. There are also some species which have wide distribution across the world.
Mostly there are three kingdoms of the animal kingdom i.e. Prototheria, Metatheria and Eutheria. Animals which remain in relationship with humans are known as Pets. Other animals staying in the forests such as Lion, Tiger, Giraffe are known as Wild Animals.
There are many different classifications of animals according to their classification in this article. Among them there are two main classifications according to the kind of animal they are. According to the classification of animals which are known as Vegetable, birds and mammals are classified into classifications according to their respective distribution. The class of animals which are known as Marine is broadly divided into three sub-divisions. The sub divisions include Fresh-water, Marine and inland aquatic.
In this class of animals there are many species of reptiles and amphibians. Some of the common animals in this class are Rats, Lizards, Salamanders, Crocodiles, frogs etc. amphibians are generally considered as warm-blooded whereas reptiles are generally considered as cold-blooded. Among the reptiles, snakes are mostly found in land habitats while amphibians are generally found in water habitats. Many species of reptiles are specialized in producing silk, feathers and fur and in particular there is a huge industry based on reptile fur. Fur and feathers are very important for the animals as it provides comfort, warmth and nutrition to them.
The classification of invertebrates also includes different types of insects. Among the many kinds of insects are dragonflies, aphids, caddisflies, lady bugs, lacewings, dragon flies, praying mantis, ants, spiders, mantises and termites. These different types of insects are found in various parts of the world. This also includes fishes which are generally considered to be invertebrate animals.
The other major group of animals is the Multicellular animals. The major groups of Multicellular animals are the Chondroitans, algae, protozoa, eukaryotic (ukaryotic) cells, and jelly-beans. All these animals are generally classified into a few major classes like the Bacteria, which are the first inhabitants of the cell; the Proteins, which are the units of protein bodies; the Lipobelle cells, which are the components of the cell walls; and the Nucleoplasm, which are the basic units of the DNA of the cells. These different groups of animals have very diverse roles in nature. Some of them are vital for the existence of other living things, while some others play major roles in the earth’s environment.