[Dan Evans]

I'm told earlier in this thread that "by definition" there is no breeding across species, how dumb can we be.

No. There can be cross-species breeding but if two animals cannot breed together they are different species.

[darbymcgill]

" No. There can be cross-species breeding but if two animals cannot breed together they are different species."

Dan, thanks for clearing that up for me. I read your post #288 to read that by definition, differing species cannot breed. Ergo lions and tigers should not be able to breed. My mistake, I see now you obviously meant that breeding across species does occur but the inability to breed, by definition, denotes a different species.