Classes of vertebrates

1. Reptiles

1.1. Live on land

1.2. Cold blooded

1.3. Skin

1.3.1. Thick

1.3.2. Scales

1.3.3. Dry

1.4. Oviparus

1.5. Legs

1.5.1. 4 strong legs

1.5.2. No legs

2. Amphibiams

2.1. Live

2.1.1. Land

2.1.2. Water

2.2. Oviparus

2.3. Breathe

2.3.1. Young - Gills

2.3.2. Adult - Lungs

2.4. Bare Skin

2.5. Adults 4 legs

2.6. Webbed feet

2.7. Cold Blooded

2.8. Wet Skin

3. Birds

3.1. Feathers

3.2. Fly

3.2.1. Wings

3.2.2. Tail

3.3. Beak

3.4. Oviparous

3.5. Live

3.5.1. Land

3.5.2. Land and water

3.5.2.1. Webbed feet

3.6. Lungs

4. Mammals

4.1. Viviparous

4.2. Lungs

4.3. Hair / Fur

4.4. Warm Blooded

4.5. Live

4.5.1. Land - Terrestrial

4.5.2. Water - Acuatic

5. Fish

5.1. Live in water

5.2. Scales

5.3. Swin

5.3.1. TAil

5.3.2. Fins

5.4. Oviparous

5.5. Cold Blooded

5.6. Gills