Geography and Evolution

As we all learned from our ecology unit, evolution involves species variation, adaptation, and eventually evolution. However, whenever we think of evolution, we often think of it as a predator vs. prey adaption. In Jerry Coyne's book Why Evolution is True, he talks about how different geographical factors could also play in evolutionary change--especially in terms of convergent evolution (pg 92). Give examples of two different species that show similar traits despite developing in separate yet similar environments, and how this could have occurred.