In which case, she says, the communication differences between the migratory and nonmigratory birds could further divide the two types of birds—or in other words, give rise to the origin of species.

她说，在这种情况下，候鸟和非候鸟之间的交流差异可能会进一步划分这两种鸟类——或者换句话说， 会导致物种起源。