Similarly, the Kachin and the Kuki-Chin groups followed separate routes of migration. This is why there is a vast variety of dialects within the Kirata family and the roots of linguistic heterogeneity go far beyond the Indian borders into the neighbouring parts of Tibet, Myanmar and Indo-China. Anthropologists as well as linguists believe that the Austric-speaking groups came earlier than the Dravidian-speaking communities. The Austric speech communities were already there in the mid-Indian region before the advent of the Dravidian. The present geography of the Austric dialect groups holds some clues to the historical processes of their diffusion into India.