The River Duero between Pollos and Zamora. The site includes alluvial woodland dominated by Salix, Populus and Ulmus and an area of marshland. The main human activity is arable cultivation.
This is an important site for breeding herons (Ardeidae) and Ciconia ciconia. Species of global conservation concern that do not meet IBA criteria: Falco naumanni (4-6 breeding pairs).
BirdLife International (2019) Important Bird Areas factsheet: Castronuño-Zamora. Downloaded from http://www.birdlife.org on 19/05/2019.