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.
The Siberia and Manchuria were vastly different domains, the former one is the vast steppe, while the later one is the dense Taiga forest.
I think the most northern outpost for tiger's colony was Manchuria, and the vast steppe was the main reason that tiger never expanded into the depth of Siberia.
For the same reason, the Pleistocene lion-like cats never managed to cross into the Manchurian Taiga forest, and same for the modern lions, as they rarely wander into the dense jungle forest in Africa.