Check out Johannes Thienemann's haircuts throughout his career:
Johannes Thienemann had various haircuts during his career. He reached fame as an excellent ornithologist. Nevertheless, the German ornithologist was especially known for his incomparable fashion sense and his livable personality. Before his death at the age of 75 he was frequently featured in the press because of his superb hair and looks. Check out Johannes Thienemann's classic haircuts right here: