The other main difference between the two species is far more difficult to explain.

These describe the nature of the relationship between the two species.

The relationship between the species is still being studied, and more changes are sure to come.

Their flowers are small, white and very similar between species.

The most striking difference between the two species is color.

But it sits long enough for me to point out the difference between the two species.

The call is often the best distinction between the species.

However, there is very little to choose between this and the other species.

Why don't we look at what she is trying to say about the relationship between human beings and other species?

These interactions between species can be considered in several ways.