Visita al Puente Colgante de Valladolid durante la mañana del 1 de noviembre de 1950, en la que, además de describirse la vegetación de la zona, se anotaron observaciones de las siguientes aves: Corvus monedula (Grajilla, llamada Coloeus por el autor), Erithacus rubecula (Petirrojo), Galerida sp. (Cogujada), Larus ridibundus (Gaviota reidora), Milvus milvus (Milano real), Motacilla alba (Lavandera blanca), Motacilla cinerea (Lavandera cascadeña), Passer domesticus (Gorrión domestico), Phylloscopus collybita (Mosquitero común), Pica pica (Black-billed Magpie) y Serinus serinus (Verdecillo).
Visit to the Puente Colgante of Valladolid during the morning of the 1st of November of 1950, in which the vegetation was described, as well as the following birds were observed: Corvus monedula (Eurasian Jackdaw, refered as Coloeus by the author), Erithacus rubecula (European Robin), Galerida sp. (Lark), Larus ridibundus (Common Black-headed Gull), Milvus milvus (Red Kite), Motacilla alba (White Wagtail), Motacilla cinerea (Grey Wagtail), Passer domesticus (House Sparrow), Phylloscopus collybita (Common Chiffchaff), Pica pica (Urraca) and Serinus serinus (European Serin).
