VERTEBRATES

1. Fish

1.1. Oviparous

1.2. Body covered in scales

1.3. They live in water

1.4. They breathe through gills

1.4.1. Examples: trout, shark, salmon, lionfish, hake...

2. Mammals

2.1. Viviparous

2.2. Body covered in hair

2.3. They can live on land, water or air.

2.4. They breed on their mothers´milk when they are born

2.4.1. Examples: horse, dog, lion, fox, bat...

3. Amphibians

3.1. Oviparous

3.2. Very thin skin

3.3. they live on land and in water

3.4. The need to live next to water

3.4.1. Examples:frog, toad,newt,salamander,caecilian...

4. Reptiles

4.1. Oviparous

4.2. Some of them have scales, some have a shell

4.3. They live on land

4.4. All of them except snakes have legs

4.4.1. Examples: snake,crocodile, alligator, lizard, turtle...

5. Birds

5.1. Oviparous

5.2. Body covered with feathers

5.3. Most of them can fly

5.4. They have wings and a beak

5.4.1. Examples: ostrich, hen ,penguin, eagle, owl...