What are three ways in which mammals similar to bird?

1. Endothermic Metabolism: Both birds and mammals are endothermic, meaning they can generate and maintain their own internal body temperature regardless of their external environment. This allows them to be active and maintain their body functions in a wide range of temperatures.

2. Hair and Feathers: While birds have feathers and mammals have hair, both structures serve similar functions in providing insulation and aiding in temperature regulation. Feathers and hair help to trap a layer of air that acts as a barrier between the animal's body and the external environment, reducing heat loss.

3. Caring for Young: Many species of mammals and birds exhibit similar behaviors when it comes to caring for their young. Parental care, such as providing food and protection, is observed in both groups. For example, mammals produce milk to nourish their offspring, while birds regurgitate food for their chicks.