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. Fish

3.1. Live in water

3.2. Scales

3.3. Swin

3.3.1. TAil

3.3.2. Fins

3.4. Oviparous

3.5. Cold Blooded

3.6. Gills

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. Birds

5.1. Feathers

5.2. Fly

5.2.1. Wings

5.2.2. Tail

5.3. Beak

5.4. Oviparous

5.5. Live

5.5.1. Land

5.5.2. Land and water

5.5.2.1. Webbed feet

5.6. Lungs