Animals are one of the creatures that live and inhabit this earth. There are far more of them than there are humans. Starting from the smallest, to the biggest, even from the simplest kind of micro-organisms, to the most complex. If we take a spoon and take some soil using the spoon, when we look at the soil through a microscope, billions of micro-organisms will be seen in it. Just imagine, how much land surface area is on earth, not to mention the depth.
Animals belong to the Animale Kingdom group (Animal Kingdom), and even, in biology or biology, humans also belong to the animale kingdom, judging from their anatomy. Judging from the shape of animals from ancient times until now, the general shape of the anatomy of the body has never changed, only the size may be different. For example, dragonflies, from ancient times until now, still have the anatomy of a body like today's dragonflies, only that their size is somewhat smaller than ancient dragonflies. This proves that animals have not undergone significant evolution (change), which means that animals have indeed been created as they are, have not undergone a complete change in shape from time to time. That is, animals do not come from the same ancestor as a whole, but have different ancestors according to their type.
Read : The Photosynthesis
Animals have various kinds with different variations, so animals can be grouped based on certain characteristics, characteristics, where they live, and so on, to make it easier for us to study them. So, in the Natural Sciences, especially biology which studies living things, especially animals, scientists classify animals based on certain conditions. Among them are:
1. Based on the type of food
2. Based on his place of life
3. Based on his body cover
4. Based on the Movement Tool
5. Based on the breeding
A. ANIMALS ACCORDING TO THEIR FOOD
Animals need food to grow and reproduce. Without food, animals would not be able to survive, and over time, over a long period of time, those animal species would become extinct. For this reason, naturally, in order to survive, animals will prey on each other.
Animals in the food chain will eat each other, except herbivores, whose food sources come from plants. But there are also animals that eat everything, both plants and animals to survive, such as chickens, which eat worms as well as seeds. From this type of food animals can be grouped into 3 (three), namely:
1. PLANT EAT ANIMALS (HERBIVORES)
Herbivores are a type of plant-eating animal. Many animals eat plants. Starting from small animals, for example: Caterpillars, to large animals, for example: Elephants. Eating plants yields little energy. To meet the energy and nutrient content, herbivorous animals eat plants in very large quantities. That's why goats or buffaloes only eat grass all day long, they work non-stop.
Plant-eating animals have many incisors for cutting the plants they eat and large molars for chewing the food. This type of animal usually has canines that are not too sharp and long, like meat-eating animals, because most of their food comes from plants. Usually plant-eating animals do not have ferocious traits or live wild, because in general they are kept and raised to meet the needs for meat, eggs, milk, skins, fertilizers, and so on. These types of animals, for example, are cows, goats, buffaloes, and others.
2. FLESH-EATING ANIMALS (CARNIVORES)
Carnivores are a type of animal that eats other animals. Carnivores always hunt other animals to get their food. Therefore, carnivorous animals have sharp nails and long, sharp canines for hunting, or sharp beaks and claws in birds.
This type of animal cannot be bred, because apart from being wild and wild, it is also rare and slow to reproduce. In addition, obtaining food is very difficult, because the food must also be animals, unlike plant-eating animals, which have a large supply of food in nature and are easy to obtain.
These carnivorous animals are generally only enough as pets, or continue to live in the wild, or are also protected in several conservation areas so they don't become extinct. Examples of carnivorous animals are crocodiles, snakes, eagles, tigers, and others.
3. ANIMALS EAT EVERYTHING (OMNIVORES)
Omnivores are a type of animal that eats plants and other animals. One example is the bear. Bears catch fish, but once upon a time, bears also looked for honey in the trees. Likewise with humans, including omnivores, because they eat plants and animals. Some omnivorous animals are bred. For example poultry such as chickens, pheasants, ducks, geese, and several other poultry animals to benefit from their meat, eggs, feathers, and some of their feces as fertilizer. Examples of other omnivorous animals are also abundant in water. For example, some fish, shrimp, and others, which sometimes also eat plankton, both animal and plant plankton.
B. ANIMALS BY PLACE OF LIVING
Animals have different places to live, and the earth is the only planet where there is life, because there is water. The location of the earth's position in our solar system is also in an ideal place, that is, not too far from the sun, which can cause extreme cold temperatures, or too close to the earth, which can cause extreme hot temperatures, so from these two extreme temperatures, is it really it is impossible to support the existence of life, although in some studies we suspect that there is also life on other planets, other solar systems, let alone other galaxies, judging from the conditions of the structure and composition of the universe, it must be the same as one another, not just the earth. On the earth itself, which is a planet that has life, of course there is life everywhere, both on land and in water. All are spread evenly, and adapt according to their environment, in order to survive. In grouping animals of this type can be divided into 3 (three) parts, namely:
Land animals are animals that live only on land. The mainland is also divided into several parts. Some live in the lowlands and highlands (livestock, pets, etc.), live in the hills, mountains, and so on. Usually many land animals live in the forest. Some parts of the other hemisphere also live in desert areas, savannas, steppes, ice (snow), and others.
Land animals that live in the forest, for example, are rare animals, both those that are protected and those that live wild. Land animals are kept generally if there are humans, such as in the lowlands, highlands, some hills, etc.
Land animals that live in the desert, for example, are scorpions, snakes, camels, and others, while those that live in the grasslands, either savannas or steppes, for example, are horses, goats, sheep, cows, donkeys, and others. Only a few animals can live in snowy (ice) areas which are generally in the polar regions, both the South Pole and the North Pole, such as polar bears, penguins, sea lions, seals, reindeer, and others.
2. WATER ANIMALS
Aquatic animals are animals that can only live in water. Animals that live in water are further divided into several parts, namely, in salt water, fresh water, and brackish water. Animals that live in brackish water are generally animals found in coastal swamp areas.
Animals that live in fresh water, generally water found on land. Such as lakes, rivers, reservoirs, ponds, ponds, and others. For example freshwater fish (carp, tilapia, catfish, cork, catfish, monitor, duck, gourami, and others).
There are many types of animals that live in salt or sea water. For example marine fish (cob, tuna, bloated, grouper, rays, jackfruit seeds, selayang/dencis, and others), shrimp, clams, squid, and others.
Animals that live in brackish water are usually found in swamps/beaches. There are also those that are reared in ponds, such as milkfish, some shrimp, and others.
3. LAND AND WATER ANIMALS
Land and water animals are animals that can live on land and in water. Both in terms of housing, as well as respiratory equipment. Generally found in swamps or beaches, or places on the outskirts between land and river water, lakes, ponds, ponds, and others. For example: Crocodiles, Frogs, crabs, turtles, and others.
Read : Water
C. ANIMALS BY COVERING THE BODY
Animals also have protective equipment in the form of body coverings. Both protect themselves from predators, and maintain body temperature stability from erratic weather, or extreme weather. In this animal is divided into 4 (four) parts, namely:
1. ANIMALS WITH SCALES
This animal has scales on its body. Generally found in various types of fish and reptiles. For example: fish, snakes, pangolins, and others
2. FURLY ANIMALS
This animal has hair all over its body. Generally there are found in various types of aves such as birds, poultry, and others. For example: birds, chickens, geese, ducks, and others
3. SLIMMICY ANIMALS
This animal has mucus all over the surface of its body. Generally there are mollusc animals. For example: jellyfish, octopus, squid, worms, and others
4. ANIMALS HAIR
Animals also have protective equipment in the form of body coverings. Both protect themselves from predators, and maintain body temperature stability from erratic weather, or extreme weather. In this animal is divided into 4 (four) parts, namely:
1. ANIMALS WITH SCALES
This animal has scales on its body. Generally found in various types of fish and reptiles. For example: fish, snakes, pangolins, and others
2. FURLY ANIMALS
This animal has hair all over its body. Generally there are found in various types of aves such as birds, poultry, and others. For example: birds, chickens, geese, ducks, and others
3. SLIMMICY ANIMALS
This animal has mucus all over the surface of its body. Generally there are mollusc animals. For example: jellyfish, octopus, squid, worms, and others
4. ANIMALS HAIR
This animal has hair all over its body. Most are land mammals. For example: monkeys, cats, cows, buffalo, and others
D. ANIMALS BY MOVEMENT
Animals in their movements must have the most dominant means of movement. For example, birds. Although birds have legs, birds tend to fly more often, so the wings are more dominantly used as a means of locomotion. It's the same with chickens, even though they have wings, they tend to use their legs as a means of movement. From here these animals can be grouped into 4 (four) parts, namely:
These animals generally move by using the legs. Usually these animals are on land. Even if in water, feet are used as a tool for swimming. Example: elephants, ducks, and others
2. ANIMALS MOVE USING WINGS
This type of animal generally uses wings as a means of locomotion to move from one place to another by jumping and or flying. However, these animals generally live on land. For example: grasshoppers, butterflies, birds, bees, and others.
3. ANIMALS MOVE USING THE STOMACH
This type of animal uses the stomach as a means of locomotion, and without legs. Usually on land. For example: snails, snakes, and others.
4. ANIMALS MOVE USING THE STOMACH AND FEET
This type of animal uses the stomach and legs as a means of locomotion. It usually tends to coincide between leg and stomach movements, because usually when walking on its feet, the stomach slightly touches the ground. Usually found in reptiles. For example: crocodiles, lizards, monitor lizards, dragons, and others.
E ANIMALS BY BREEDING
Animals, when viewed from the point of view of their breeding, some lay eggs and give birth to children, some even have both. Breeding in animals aims to maintain the species or species so that it does not become extinct, and is divided into 3 (three) parts, namely:
1. ANIMAL SLAYING EGG (OVIVAR)
This type of animal reproduces by laying eggs. This type of animal generally does not have ears. For example: crocodiles, ducks, chickens, turtles, and others
2. LIVER ANIMALS (VIVIVAR)
This type of animal breeding is by giving birth or giving birth. Generally have auricles. For example: goats, rats, cows, horses, camels, cats, buffaloes, donkeys, lions, and others
3. EGG-SEALING AND LIVERING ANIMALS (OVOVIVIVAR)
This type of animal reproduces by giving birth and laying eggs or both. For example: some types of lizards and snakes.
F. ANIMALS ACCORDING TO THE BACKLINE
There are 2 (two) types of grouping based on the ownership of the backbone, namely:
1. BACKGROUND ANIMALS (VERTEBRATES)
Vertebrates are animals that have a backbone. In this type it is further divided into 2 (types), namely:
a. Warm Blooded Animals
* Mammals (Bear, Tiger, Whale) etc.)
* Aves/Poultry (Ostriches, Peacocks, etc.)
b. Cold Blooded Animals.
* Types of Fish (Salmon, Goldfish, Guppies, etc.)
* Reptiles / Reptiles (Turtles, Crocodiles, Snakes, etc.)
* Amphibians (Frogs, Frogs, Newts, etc.)
2. ANIMALS WITHOUT BACKSPINS (INVERTEBRATES)
Invertebrates are a type of animal that does not have a backbone or backbone. In this type it is further divided into 2 (types), namely:
a. Legged animal.
* 3 Pairs of Legs (Ants, Cockroaches, Ladybugs, etc.)
* More than 3 Pairs of Legs (Scorpions, Spiders, Millipedes/Luwing, etc.)
b. Legless animal
* Types of Worms (Earthworms, Leeches, etc.)
* Not Worm Type (Heart Worms, Tape Worms, etc.)
Animals in the study above are additional references for learning at school in the Science and Biology subject. Hopefully it can add insight, especially things related to animals.