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For example, on the Sepik River and its tributaries, plants are sturdy, flowers have little colour on the lip and are smaller than the pristine white sepals and purple labellum elsewhere; while on Wulai Island in Kimbe Bay, the flowers are again smaller, on inflorescences half the size of those on the mainland, with petals creamy white, thick and shiny.
In the central highlands and the Sepik valley there is a dark morph; males of this form are mostly blackish with a grey tail and the females are mostly dark brown.
Sepik–Ramu would consist of a hundred languages of the Sepik and Ramu river basins of northern Papua New Guinea, but spoken by only 200 000 people in all.
In 1885 he was the first European to discover the Sepik river, and he named it after Kaiserin Augusta, the German Empress.
The locality is the birthplace of Ernest Chinnery (5 November 1887- 17 December 1972), an Australian anthropologist and public servant who worked extensively in Papua New Guinea and visited communities along the Sepik river.