Area of Navalvillar de Pela (Badajoz / Cáceres provinces), from the Military Map of Spain 1:200.000, No. 4-8, from Servicio Geográfico del Ejército. The blue line indicates the limit of the area used by the branes. The green lines show the main feeding areas. The separate blue lines in the north and south represent respectively the southern and northern edges of the former Zorita and  Orellana wintering areas. 

Source: Alonso, J.A. and J.C. Alonso (Eds.). 1990. Distribución y Demografía de la Grulla Común (Grus grus) en España. Colección Técnica, ICONA, Madrid.