Abstract
Anyone involved in research into the natural history of the Himalayas will certainly come across the publications of Jochen Martens or papers based on material collected by him. The same is true for the field of avian systematics and bioacoustics and for the taxonomy and systematics of harvestmen. On the occasion of the retirement of Prof. Dr Jochen Martens from the Johannes Gutenberg University in Mainz, Germany, his colleagues from all over the world would like to honour him with scientific contributions compiled in this commemorative publication.