1 Department of Wetland Ecology, Estación Biológica Doñana, Sevilla, Spain.
2 CIBER Epidemiología y Salud Pública (CIBERESP), Spain.
3 Departamento de Zoología, Universidad de Sevilla, Sevilla, Spain.
4 Julius Kühn-Institute, Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Horticulture and Forests, Vertebrate Research, Münster, Germany.