In the 1950s, Eugeniusz Nowak conducted his postgraduate research in Berlin under the supervision of Erwin Stresemann, then the most famous scientific ornithologist in Europe. He completed his Magister in Berlin, then after gaining his PhD while working as a lecturer in the Department of Zoology at Warsaw University, in the early 1960s his interest shifted to wetlands. Subsequently, he worked at Slimbridge, England, at the International Waterfowl and Wetlands Research Bureau (IWRB) as part of the team that eventually created the Convention on Wetlands of International Importance in 1971, better known as the Ramsar Convention. He later moved to West Germany, where he worked in the Federal Research Institute for Nature Conservation and Landscape Ecology in Bonn, and was involved in the drafting of the Convention on the Conservation of Migratory Species of Wild Animals (the Bonn Convention). Later, and until his retirement, Dr Nowak was a scientific advisor at the UNEP Secretariat of the Convention on the Conservation of Migratory Species of Wild Animals, also in Bonn. His publications at this time were mainly technical papers on bird and landscape conservation or concerned with Polish and German ornithological history. After his retirement in 1998 he began to produce a series of often controversial short biographies.