ANIMALS3rd Grade

THE CLASSIFICATION OF ANIMALS

We can classify animals using

different criteria:

1.THE SKELETONVERTEBRATES have a skeleton.

INVERTEBRATES don´t have a skeleton.

2. THE WAY ANIMALS ARE BORN

VIVIPAROUS animals are

born from their mother´s womb.

OVIPAROUS animals are born from

eggs.

VIVIPAROUS ANIMALS are born live

• They depend on their mothers when they are babies.

• They drink their mother´s milk.• Examples: dogs, cats, lions, horses, cows, etc.

OVIPAROUS animals are born from eggs

Some oviparous animals, like

birds, keep their eggs warm.

The female animals lay the eggs.

Others, like sardines and

flies, don´t keep their eggs warm.

• Some oviparous animals are independent when they are born.

• For example, snakes leave their eggs. The baby snakes move around and find food.

• Other oviparous animals can´t look after themselves.

• For example, baby sparrows stay with their parents. The adult birds feed them and protect them.

3. THE FOOD ANIMALS EAT

Animals are living things, so they need to eat food.

According to the food they eat, we can classify animals into three groups:

HERBIVORES eat plants.

They eat different parts of plants such as leaves, roots and fruit.

Herbivores have special teeth to help them cut and chew plants.

Examples: deer, cows, rabbits…

• Carnivores hunt and eat other animals.

CARNIVORES eat other animals

They have excellent eyesight

They have sharp teeth.

FOXES are carnivores. They eat mice, rabbits and other animals.

OMNIVORES eat both plants and other animals.

Examples:Bears, monkeys, pigs…

Bears eat fish, fruit and honey.

4. THE WAY ANIMALS MOVE

Animals that WALK Animals that SWIM

Animals that FLY Animals that CRAWL