1. MTA‐DE “Lendület” Behavioural Ecology Research Group Department of Evolutionary Zoology and Human Biology University of Debrecen Egyetem tér 1 Debrecen H–4032 Hungary
2. Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 Cluj Napoca RO–400006 Romania
3. Museum of Zoology Babeş‐Bolyai University Clinicilor Street 5–7 Cluj Napoca RO–400006 Romania
4. ‘Milvus Group’ Bird and Nature Protection Association Márton Áron street 9/BTîrgu Mureş RO–540058 Romania
5. Faculty of Life Sciences University of Manchester Manchester M13 9PT UK