Zoological Institute, University of Zurich-Irchel, Switzerland. Rolnot@Zool.unizh.ch
This article gives a short and personal portrait of Ernst Hadorn (1902-1976), one of the most influential developmental biologists in Europe. Hadorn initially worked with amphibia, but then soon turned to Drosophila where he very successfully studied lethal factors and the development of imaginal disks.