| Summary: | Recopilación de observaciones de Halcón preregrino (Falco peregrinus) realizadas durante varias salidas de campo a diferentes enclaves de la provincia de Valladolid, entre el 28 de agosto de 1948 y el 12 de junio de 1953. Incluye morfometría y dos ilustraciones de una hembra capturada en Cótar (Burgos) el 11 de abril de 1950, entre otras. Compilation of observations of the Peregrine Falcon (Falco peregrinus) achieved through many field trips to different habitats of the province of Valladolid, between the 28th of August of 1948 and the 12th of June of 1953. Morphometric data and two illustrations of a female captured in Cótar (Burgos) the 11th of April of 1950 are included as well, among others.
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