Both usually produce few young at one time, and ensure their survival by caring for them. Unlike mammals, birds lay eggs and initial stages of development occur outside the mother’s body. Reproductive ...

Evolutionary biogeography; community and conservation ecology; human impact on native ecosystems; ecology, distribution, and systematics of mammals of western North ...

Mammals live all across the world. They can be found living in the ground, in trees, and even in the sea. There are many different kinds of mammal, including us humans! Find out more about ...