How Are Animals Different?

1. ​mammal

2. ​bird

3. ​fish

4. ​reptile

5. ​amphibian

6. ​insect

​All animals must eat to live. Some eat plants, and some eat other animals.

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​They have special parts to help them find and eat food, like mouths, teeth, or claws.

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​Animals also have special body parts for moving, like legs, fins, or tails.

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​All animals can reproduce!

​The group of animals that live in water and get oxygen through gills.

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Fish have scales and use fins to swim.

​The group of animals with fur or hair on their bodies.

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​Most mammals have live young.

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​Young mammals drink milk from their mother's body.

​The group of animals with feathers on their bodies with wings.

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Most birds can fly.

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​The group of animals with smooth, wet skin.

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Young amphibians live in the water, and most adults live on land.

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​Amphibians lay eggs.

​The group of animals with dry skin covered in scales.

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​Scaly skin helps protect reptiles from harm.

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​Some reptiles move around on legs, but snakes slither along the ground.

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​Most reptiles lay eggs.

​A kind of animal that has three body parts and six legs.

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​Some insects fly.

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​Others walk on six legs.

​All fish live in water.

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​They have special features that help them survive there.

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​Fish live in water and have fins for swimming.

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​The temperature of their body changes when the temperature of the water changes.

​Insects come in so many shapes and sizes!

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A fly looks very different from a ladybug.

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It's hard to tell they are in the same group of animals.

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But although they look very different, all insects share a few special features.

​Reptiles and amphibians are two kinds of animals that sometimes look very much the same.

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​But they have any important differences.

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​Let's look at reptiles first.