Mammals are a type of animals in the world. There are thousands of types of mammals. But certain characteristics are common in all the mammals. There are five things all mammals have in comman. These are the common characteristics of mammals.1. All mammals have bones including a backbone.
2. All mammals have lungs and breathe dry air.
3. All mammals are warm-blooded.
4. All mammals have some fur or hair on their bodies.
5. All female mammals feed their babies on milk.
Common Characteristics Of Mammals