The article by Lionel Maumary and others contains the detailed description of the first ST Eagle breeding in Switzerland /map/ in 2012, observations of the breeding biology and the diet data particularly:
• Lionel MAUMARY, Hubert DUPERREX, Jacques CLOUTIER, Laurent VALLOTTON, 2013 – Première nidification du Circaète Jean-le-Blanc (Circaetus gallicus) en Suisse – Observations sur la biologie de reproduction, en particulier le régime alimentaire [The first nesting of Short-toed Snake Eagle in Switzerland – Observations of the reproductive biology, and the diet] // Nos Oiseaux, 60: pp. 3-24. (Fr) {rough translation}.