There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
Well, the Northern Asian tiger and the Southern Asian tiger are differentiated as two separated clades within a continental subspecies, just like many African lions from different areas just belong to a common subspecies.
I think the main reason is there is no significant geographical barrier to truly genetically isolate them, unlike the one between the Mainland tiger and the Sunda tiger.