1. Department of Evolutionary Ecology; Estación Biológica de Doñana-CSIC; Seville Spain
2. Department of Plant Systematics, Ecology and Theoretical Biology; MTA-ELTE, Theoretical Biology and Evolutionary Ecology Research Group; Eötvös Loránd University; Budapest Hungary
3. Ornithological Station, Museum and Institute of Zoology; Polish Academy of Sciences; Warsaw Poland
4. Centro para el Estudio y Conservación de las Aves Rapaces en Argentina (CECARA-UNLPam) & Instituto de las Ciencias de la Tierra y Ambientales de La Pampa (INCITAP); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Santa Rosa Argentina
5. Department of Systematic Zoology and Ecology; Behavioural Ecology Group; Eötvös Loránd University; Budapest Hungary
6. Ecology Research Group; Hungarian Academy of Sciences; Budapest Hungary