Población y distribución del búho real "Bubo bubo" (Linnaeus, 1758) en Gipuzkoa

This report presents the results of monitoring the Great owl Bubo bubo (Linnaeus, 1758) populations and distribution throughout the Historical Terri- tory of Gipuzkoa (Basque Country) during the breeding seasons of 2009-2010 and 2010-2011. Three nesting territories were recorded during those years, ofwhich two pairs bred successfully. The results of the survey reveal a popu- lation increase, although several hazards have been detected that could threaten their stability.