[autumnraine]

So, you mean if robins and an owls get segregated on an island somewhere, they will eventually mate to become a whole new species of bird?

[Phileleutherus Franciscus]

So, you mean if robins and an owls get segregated on an island somewhere, they will eventually mate to become a whole new species of bird?

Since robins and owls cannot interbreed (their last common ancestor was a looooong time ago), no. What would happen, if the survival pressures were sufficient, or the time was long enough, is that the robins and the owls on the island would change enough that they could no longer interbreed with the robins and owls on the mainland. What visible changes might accompany those changes would depend on how different the survival traits optimized for the island were from the survival traits optimized for the mainland.

[Marie2]

“So, you mean if robins and an owls get segregated on an island somewhere, they will eventually mate to become a whole new species of bird?”

Darwinian evolution would teach that the robins and owls, some of them, would eventually become a whole new species entirely. Not just a bird of a different feather.