Classification of Animals

1. Animals with legs

1.1. 3 pairs of legs

1.2. 4 pairs of legs

1.3. more than 4 pairs of legs

2. Animals without legs

2.1. worm-like

2.2. non-worm-like

3. Invertebrates

4. Vertebrates

4.1. Amphibians

4.2. Fish

4.3. Birds

4.4. Mammals

4.5. Reptiles