On September 19th, 2021, Willem Schoonen interviewed Raf de Bont for the newspaper Trouw. You can read the interview (in Dutch) here: https://www.trouw.nl/wetenschap/vogels-wezen-de-vroege-natuurbeschermers-de-weg~be9adb5e/

*Credits picture: Yrjö Jyske (2001), flickr.com