New Guinea and Irian Jaya I'm sure will both continue to delight us naturalists with new discoveries and re-discoveries for many years to come. Perhaps even into the next century. It's interior still remains largely inaccessible (except by helicopter), conditions to collect are likely tough even by the standards of ardent field collectors, and then of coarse there remains questions about one's safety and getting all the necessary permits. So I believe, it will take quite a while still to even begin seeing all the many possibilities that unique place holds. It's still one of the "wildest" places left along with the Solomons, Borneo, and a few other places.
About the Wandammen Mounts, Henk and his friends did organize some expeditions there, here are the list of expeditions to the Wandammen Mts according to the Papua Insect Foundation website :
1828 - Salomon Müller collects butterflies in Lobo, Triton Bay. 1838 - Dumont D'Urville visits Triton Bay to collect insects. 1892 - The English animal collector W. Doherty collected many birds and insects, of which mostly butterflies. He visited the Geelvink Bay (Cenderawasih Bay), Wendesi and Roon. 1894 - The British sea captain H.C. Webster collected butterflies and birds in the Etna Bay. 1896 - Doherty visits New Guinea for the second time, visiting Roon. 1904 - 1905 The first Southwest New Guinea expedition (K.N.A.G.) in the Etna Bay, by J.A. Kroesen, R.J. Posthumus Meyjes, E.J. de Rochemont, J.W.R. Koch and C. Moerman. 1907 - Charles Pratt visited Wendesi (December 1908). 1914 - In order of J.J. Joicey (owner of the private Hill Museum) A.E. Pratt and his sons collected at the end of 1914 in the Wandammen Mountains. 1928 - Ernst Mayr, a German ornithologist, collected birds, mammals, plants and insects in the Wandammen Mountains. 1941 - The Negumy Expedition south of the Wandammen Peninsula, which was joined by E. Lundquist who collected butterflies. 1993 - Expedition of the Zoological Museum of Amsterdam to Wandammen and Roon, by Arnold de Boer, Twan Rutten and Rob de Vos. 1996 - Expedition of the Zoological Museum of Amsterdam to Wandammen, by Arnold de Boer, Gerrit Withaar, Piet Zumkehr and Rob de Vos. 2009 - An inventorial survey of WWF-KEP, by Henk van Mastrigt and biology students. 2010 - Members of the Entomological Society of Latvia visited the southern part of the Bird's Neck (Kaimana, Bitsyari bay, Triton bay, Triton lakes).
A nice pair of Delias subviridis Joicey & Talbot 1922 from my collection. A rare species especially as regards the female. D. subviridis is found in the Manusela Range in Central Ceram. Discovered by the Pratt Brothers in 1921, when they took a small series of both sexes. It is interesting to note that the Pratt Brothers were equally successful in obtaining the females of Delias species as well as the males. Those intrepid collectors built bamboo climbing ladders and platforms high into the canopy where the rarer Delias were visiting flowers, and with the use of long handled nets their prizes were secured. It is a great pity for students of Delias and other butterflies, that Felix or Charles Pratt left just snippets but no detailed written accounts of their travels through Western New Guinea and islands such as Ceram and Buru. Top male, bottom female.