1. Department of Bioscience; Aarhus University; Rønde Denmark
2. Departamento de Zoología; Facultad de Biología; Sevilla Spain
3. Amphi Consult; Ribe Denmark
4. Avifauna Consult; Vesløs Denmark
5. Ecologie Systématique Evolution; CNRS; Université Paris-Sud; AgroParisTech, Université Paris-Saclay; Orsay France