Mammals

1. Non-Mammals

1.1. Fish

1.1.1. Snakes

1.1.1.1. Frogs

2. Non-Characteristics

2.1. Cold-Blooded Animals

2.2. Exoskeleton

2.3. Feathers

2.4. Lays Eggs for Reproduction

3. Examples

3.1. Dolphin

3.1.1. Humans

3.1.1.1. Monkeys

3.1.1.1.1. Polar Bear

4. Characteristics

4.1. Give birth to their offspring

4.1.1. warm blooded