This document classifies and describes different types of animals. It discusses how animals are classified based on their diet, habitat, interactions with humans, means of birth, and whether they have an internal skeleton or exoskeleton. Key animal groups covered include mammals, birds, reptiles, amphibians, fish, arthropods such as insects and arachnids, mollusks, and others. Their defining characteristics and examples of common animals in each group are provided.

2. ANIMALS CLASSIFICATION
 Animals are classified according to different
characteristics:
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

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What they eat: carnivorous, herbivorous or omnivorous.
Where they live: terrestrial or aquatic.
How they interact with humans: wild or domestic.
The way they are born: oviparous or viviparous.
If they have internal skeleton or not: invertebrate
or vertebrate.

3. CARNIVOROUS ANIMALS
 They eat other animals.
 These are some carnivorous animals:

4. HERBIVOROUS ANIMALS
 They eat plants: roots, stems, leaves,
flowers, fruits...
 These are some herbivorus animals:

5. OMNIVOROUS ANIMALS
 They eat other animals and plants.
 These are some omnivorous animals:

6. TERRESTRIAL ANIMALS
 They mainly live on land. Sometimes
they can get into water.
 They can move in different ways and
use different body parts:
 Walking (legs)
 Flying (wings)
 Crawling/ sliding (body)

7. AQUATIC ANIMALS
 They live in water.
 They use their tails, fins or tentacles to
swim.
 Some of them don’t swim.

8. WILD ANIMALS
 They live freely in their natural
environment.

9. DOMESTIC ANIMALS
 They live with humans:
 Keep us company
 Help us at work
 Give us food

10. VIVIPAROUS ANIMALS
 They are born from their mother’s
womb.
 After being born, the babies drink milk
from their mothers.

11. OVIPAROUS ANIMALS
 They are born from eggs.
 Some of them incubate their eggs after
laying them, they keep them warm.

12. VERTEBRATE ANIMALS
 They have got an internal skeleton.
 They have got different body parts:

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Head
Trunk: where the backbone and ribs are
Tail: an extension of the backbone.
Limbs: some animals have got legs or arms
or fins or wings. Some haven’t got limbs.

13. VERTEBRATE ANIMALS
 They are divided into 5 groups:
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Mammals
Birds
Reptiles
Amphibians
Fish

14. VERTEBRATE ANIMALS
MAMMALS
 Most of them are viviparous.
 They drink their mother’s milk when they are born.
 They are warm-blooded animals.
 They have got 4 limbs.
 They breathe through lungs.
 Can be aquatic or terrestrial.
 Some of them can fly.
 Most of them are covered by hair.

15. VERTEBRATE ANIMALS
MAMMALS
These are some mammals:

16. VERTEBRATE ANIMALS
BIRDS
 They are oviparous. They incubate eggs in nests.
 They are covered by feathers.
 They are warm-blooded animals.
 They have got wings.
 Not all of them can fly.
 They have got a beak.
 They breathe through lungs.
 Some of them live in water and on land.

17. VERTEBRATE ANIMALS
BIRDS
These are some birds:

18. VERTEBRATE ANIMALS
REPTILES
 They are oviparous.
 They are covered by scales.
 They are cold-blooded animals.
 Some of them have got legs and some of
them haven’t.
 They can walk, swim or crawl.
 They breathe through lungs.

19. VERTEBRATE ANIMALS
REPTILES
These are some reptiles:

20. VERTEBRATE ANIMALS
AMPHIBIANS
 They are oviparous.
 They have got damp skin.
 They are cold-blooded animals.
 They live in water and on land.
 They breathe through lungs and their skin.
 They eat insects and small animals.
 They swim, walk or skip.

21. VERTEBRATE ANIMALS
AMPHIBIANS
 Since they go out of the egg until they become adults,
amphibians go through a process called metamorphosis.

22. VERTEBRATE ANIMALS
AMPHIBIANS
These are some amphibians:

23. VERTEBRATE ANIMALS
FISH
 They are oviparous.
 They are covered by scales.
 They are cold-blooded animals.
 They live in water.
 They breathe through gills.
 They swim with their fins and tails.

24. VERTEBRATE ANIMALS
FISH
These are some fish:

25. INVERTEBRATE ANIMALS
 They have not got an internal skeleton.
 Most of them have got something to
protect their body:
 Exoskeleton.
 Shell.
 Anything.
 There are different types of invertebrate
animals:
 Arthropodes.
 Mollusks

26. INVERTEBRATE ANIMALS
ARTHROPODES
They are the most numerous animals on
Earth.
They are covered by an exoskeleton. They
are classified into:
 Insects
 Arachnids
 Crustaceans

27. INVERTEBRATE ANIMALS
ARTHROPODES
 Insects:
 Have got 6 legs.
 Have got 3 body parts: head, thorax and
abdomen.
 Have got antennae.
 Some of them have got wings.
 Most
insects
go
through
the
metamorphosis process.

28. INVERTEBRATE ANIMALS
METAMORPHOSIS

29. INVERTEBRATE ANIMALS
ARTHROPODES
 Insects:
These are some insects:

30. INVERTEBRATE ANIMALS
ARTHROPODES
 Arachnids:
 Have got 8 legs.
 Have got 2 body parts: cephalothorax
and abdomen.
 Haven’t got antennae.
 Haven’t got wings.

31. INVERTEBRATE ANIMALS
ARTHROPODES
 Crustaceans:
Most of them are aquatic and breathe
through gills.

32. INVERTEBRATE ANIMALS
MOLLUSKS
They are soft-bodied animals, usually
protected by a shell.