Viewing a single comment thread. View all comments

Onithyr t1_j5mkf6y wrote

Well, yes and no. There are certainly points of separation beyond which interbreeding either doesn't happen, extremely rarely happens, or results in a non-viable offspring.

This is one of the reasons I brought up the topic of ring species. They demonstrate an entire spectrum of interbreeding specimens, the ends of which either do not or cannot interbreed despite living in the same location.

1