But aside from the superficial contact of trade and warfare, life for the Greek colonists was isolated from the surrounding Illyrian peoples. The Hellenistic culture of the Greek enclaves existed in parallel with the late iron age culture of the wider Illyro-Celtic population. On the mainland the Illyrian ethno-tribal groups were organizing their centers. Illyrian art became influenced by Greek Art, and the Illyrian ethno-tribal groups copied the styles and methods of the Greeks. This can be seen, for example in the Daors tribe of the Neretva Delta.