Animal Groups

The main animal groups are Mammals, Reptiles, Amphibians, Fish, Birds, Insects and Arachnids.

Mammals

Mammals include bats, cats, whales and humans. Many large animals belong to this group. in order for an animal to be classified as a mammal it must have fur and feed its young on milk.

Reptiles

Reptiles include snakes, lizards, turtles, and crocodiles. reptiles are cold-blooded animals, or ectothermic, which means they don't produce their own body heat. They are usually covered with tough, dry skin and horny scales. with the exception of turtles, they have teeth.

Amphibians

Amphibians have bodies that have changed so that they can live both on land and in water. This group includes frogs, toads, newts, and salamanders.
Amphibians have moist, hairless skin through which water can pass. They usually live the first part of their lives in water and the second part on land. They are the ancestors of reptiles which in turn gave rise to mammals and birds.

Fish

Fish are a large group of underwater creatures. It includes sharks, seahorses and eels. they are all vertebrates and have gills for breathing.

Birds

The bird group includes birds that fly and birds that can not fly. Their bodies are covered with feathers and they have a beak instead of a mouth.

Insects

Insects are the largest group of animals. They includes bees, ants, butterflies, lice, , and flies. Insects have 6 legs. The insect body usually has 3 main parts, a head, thorax and abdomen. Insects are invertebrates.

Arachnids

Arachnid is a term for animals that include scorpions, spiders, mites and ticks and certain other eight-legged land invertebrates. Fossil records suggest that they were among the first animals to live on land.

Credit: images from
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