Complejo Endorreico de Espera Natural Reserve
Situated close to the Seville/Cadiz provincial border is the 438ha Complejo Endorreico de Espera Natural Reserve, with three lakes: Hondilla, Salada de Zorrilla and Dulce de Zorrilla. This is a significant site for waterfowl, since four out of the 15 aquatic bird species that are increasingly rare in Spain breed or overwinter here. These four are the red-knobbed coot and three types of duck: white-headed, marbled and ferrunginous.