Give me an example of a hybrid "species" that is fertile with itself and not fertile with either parent species.
Don't fall for the ploy. He will consistently move the goal posts to avoid admitting observed speciation if you don't force him to define all of the conditions in advance. And, if he does define all the conditions, they will likely be set up so as to be impossible to satisify under any reasonable circumstance.
There's no point in producing evidence only to have it dismissed as not meeting a set of conditions which are constantly redefined so as to avoid admitting that observed speciation is scientifically established.
I'll do my best. Repeating: Give me an example of a hybrid "species" that is fertile with itself and not fertile with either parent species.