Dam of the Sierra Brava Reservoir (Zorita Plains and Sierra Brava Reservoir SPA)
This is one of the most important sites for wintering birds in Extremadura. The dam was completed in 1996 and created a new water body of 1650 ha. The water for the reservoir comes from the Pizarroso stream, which subsequently joins the Ruecas River, a tributary of the Guadiana. The PIO is at the dam because from here there is a view across the water body and of the large numbers of wintering waterfowl, as well as a view south over the irrigated farm lands.
See more information at http://aves-extremadura.blogspot.com.es/2013/03/censo-de-anatidas-en-sierra-brava-y.html (Spanish)
Location on the map: