Classifications Of Animals
Published on Nov 18, 2015
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In order for us to understand how all living organisms are related, they are arranged into different groups. The more features that a group of animals share, the more specific the group is. Animals are given scientific names so that people all around the world can communicate about animals, no matter what language they speak (these names are traditionally Latin words). Animals belong to a number of different groups, starting with the animal kingdom.
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Taking the animal kingdom as an example, we can see that it is split into two clear groups:
Invertebrates - animals without a backbone.
Vertebrates - animals with a backbone.
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Invertebrates
WHAT ARE THE TYPES OF ANIMALS
Mammals
People are mammals. So are dogs, cats, horses, duckbill platypuses, kangaroos, dolphins and whales. What do all these animals have in common, you ask?
The answer is – MILK! If an animal drinks milk when it is a baby and has hair on its body, it belongs to the mammal class.
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Birds
Birds are animals that have feathers and that are born out of hard-shelled eggs.
Some people think that what makes an animal a bird is its wings. Bats have wings. Flies have wings. Bats and flies are not birds. So what makes an animal a bird?
peacock
The answer is feathers!
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Fish
Fish are vertebrates that live in water and have gills, scales and fins on their body. There are a lot of different fish and many of them look very odd indeed. There are blind fish, fish with noses like elphants, fish that shoot down passing bugs with a stream of water and even fish that crawl onto land and hop about!
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Amphibians
Amphibians are born in the water. When they are born, they breath with gills like a fish. But when they grow up, they develop lungs and can live on land.
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Reptiles
Reptiles are a class of animal with scaly skin. They are cold blooded and are born on land.
Snakes, lizards, crocodiles, alligators and turtles all belong to the reptile class.
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Of the million or more animal species in the world, more than 98% are invertebrates. Invertebrates don't have an internal skeleton made of bone. Many invertebrates have a fluid-filled, hydrostatic skeleton, like the jelly fish or worm. Others have a hard outer shell, like insects and crustaceans.
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Marine Invertebrates - There are a wide variety of interesting ocean animals that are invertebrates. These include sponges, corals, jellyfish, anemones, and starfish.
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Mollusks - Mollusks have a soft body that is covered by an outer layer called a mantle. Many mollusks live inside a shell, but not all of them. Some examples of mollusks include squid, snails, slugs, octopuses, and oysters.
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Crustaceans - Crustaceans are a type of arthropod, meaning that they have jointed legs. They also have an exoskeleton (their bones are on the outside like a shell). Some examples of crustaceans are crabs, lobster, shrimp, and barnacles.
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Worms - The term "worm" is not a scientific word, but is often used to refer to invertebrate animals that don't have legs. Worms may live in the soil, in the water, or even inside other animals as parasites. Some examples include the tapeworm, the leech, and the earthworm
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Insects - Insects are part of the Earth's largest animal phylum, the arthropods. There are over 1 million species of insects including such animals as the grasshopper, dragonfly, yellow jacket, butterfly, and praying mantis.
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Spiders, Centipedes and Scorpions - These animals are all part of the arthropod phylum. Spiders and scorpions are arachnids because they have eight legs. Centipedes and millipedes are myriapods and have lots of legs. Some myriapods have as many as 750 legs. Some example species include the tarantula and black widow, which are both spiders.
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