Classification

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Classification

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Classification?

Animals are separated into groups or categories so that they are more easily studied and discussed by scientists and others.

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Animal Classification

Mammals

Fish

Birds

Reptiles

Amphibians

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Mammals

Characteristics:

Have teeth

Have hair

Are warm blooded

Have a single jaw bone

Have inner ear bones

Produce milk for their young

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Mammals

Mammals have larger brains and seem to be the most capable learners.

All mammalian mothers nourish their babies with milk.

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Fish

Characteristics:

Are cold-blooded vertebrate (backbone)

Live in water

Usually have paired fins, gills, and scales

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Fish

Most fish lay large numbers of eggs, but some have live birth.

Most fish breathe by drawing water over four or five pairs of gills.

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Amphibians

Characteristics:

Are cold-blooded vertebrate (backbone)

Lay their eggs in water

Lack any skin coverings such as fur, scales or feathers

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Amphibians

Young amphibians tend to resemble small fish.

Amphibian means "two lives," a reference to the change that frogs go through as they move from egg to tadpole to frog.

Even as adults, most frogs and other amphibians must stay close to water.

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Birds

Characteristics:

Have feathers

Lay eggs

Have bodies specially adapted for flight

Have a beak rather than teeth

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Birds

Their nearly hollow bones provide lightweight strength.

Birds now live almost everywhere on Earth.

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Reptiles

Characteristics:

Have scales

Lay leathery eggs on land

Are often called cold-blooded because they can't regulate their own body temperature

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