| Summary: | Recopilación de observaciones sobre la ecología general y anidamiento del Alcaudón real (Lanius meridionalis, llamado L.excubitor por el autor), realizadas en diversas salidas de campo a diferentes localidades de las provincias de Valladolid y Burgos, entre el 8 de junio de 1947 y el 10 de agosto de 1952. Compilation of observations about nesting and general ecology of the Great Grey Shrike (Lanius meridionalis, refered as L.excubitor by the author), carried out through some field trips to different villages of the provinces of Valladolid and Burgos, between the 8th of June of 1947 and the 10th of August of 1952.
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