Salida de campo a Laguna de Duero (Valladolid) el 20 de febrero de 1952, de la que se anotaron observaciones sobre Arvicola sapidus (Rata de agua), las siguientes aves: Accipiter nisus (Gavilán común, también llamado Astur palumbarius por el autor), Alondra (probablemente, la alondra común, Alauda arvensis), Anas acuta (Ánade rabudo), Anas crecca (Cerceta común), Anas penelope (Silbón europeo), Anas platyrhynchos (Ánade azulón), Anthus sp. (Bisbita)Ardea sp. (Garza), Carduelis carduelis (Jilguero), Ciconia ciconia (Cigüeña blanca), Circus aeruginosus (Aguilucho lagunero occidental), Circus cyaneus (Aguilucho pálido), Corvus corone (Corneja negra), Corvus frugilegus (Graja), Corvus monedula (Grajilla, llamada Coloeus por el autor), Emberiza cia (Escribano montesino), Falco tinnunculus (Cernícalo vulgar), Fringilla sp. (Pinzón), Galerida sp. (Cogujada), Gallinago gallinago (Agachadiza común, llamada Capella gallinago por el autor), Limosa sp. (Aguja), Miliaria calandra (Triguero, llamada Emberiza calandra por el autor), Milvus milvus (Milano real), Passer montanus (Gorrión molinero), Periparus ater (Carbonero Garrapinos, llamado, Parus ater por el autor), Phoenicurus ochruros (Colirrojo tizón), Larus sp. (Gaviota), Lophophanes cristatus (Herrerillo capuchino, llamado, Parus cristarus por el autor), Phylloscopus collybita (Mosquitero común), Picus viridis (Pito real), Rallus aquaticus (Rascón europeo), Sturnus unicolor (Estornino negro), Tringa ochropus (Andarríos grande), Turdus merula (Mirlo común) y Vanellus vanellus (Avefría europea), e insectos de los siguientes grupos, hallados en egagrópilas: Carabidae (probablemente, "Leptura", Coleoptera), Dytiscus sp. (Coleoptera), Formicidae, Lepidoptera y Hemiptera. Incluye pequeñas ilustraciones a rotulador.
Field trip to Laguna de Duero (Valladolid) the 20th of February of 1952, of which there were noted observations about Arvicola sapidus (Southern Water Vole), the following birds: Accipiter nisus (Eurasian Sparrowhawk, also refered as Astur palumbarius by the author), Anas acuta (Northern Pintail), Anas crecca (Common Teal), Anas penelope (Eurasian Wigeon), Anas platyrhynchos (Mallard), Anthus sp. (Pipit), Ardea sp. (Heron), Carduelis carduelis (European Goldfinch), Ciconia ciconia (White Stork), Circus aeruginosus (Western Marsh-Harrier), Circus cyaneus (Northern Harrier), Corvus corone (Carrion Crow), Corvus frugilegus (Rook)Corvus monedula (Eurasian Jackdaw, refered as Coloeus by the author), Emberiza cia (Rock Bunting), Falco tinnunculus (Common Kestrel), Fringilla sp. (Chaffinch), Galerida sp. (Lark), Gallinago gallinago (Common Snipe, refered as Capella gallinago by the author), Lark (possibly, the Eurasian Skylark, Alauda arvensis), Larus sp. (Gull), Limosa sp. (Godwit), Lophophanes cristatus (Crested Tit, refered as Parus cristatus by the author), Miliaria calandra (Corn Bunting, refered as Emberiza calandra by the author), Milvus milvus (Red Kite), Passer montanus (Eurasian Tree Sparrow), Periparus ater (Coal Tit, refered as Parus ater by the author), Phoenicurus ochruros (Black Redstart), Phylloscopus collybita (Common Chiffchaff), Picus viridis (Eurasian Green Woodpecker), Rallus aquaticus (Water Rail), Sturnus unicolor (Spotless Starling), Tringa ochropus (Green Sandpiper), Turdus merula (Eurasian Blackbird) and Vanellus vanellus (Northern Lapwing), and insects from the following taxa, found in pellets: Carabidae (Ground Beetle; possibly "Leptura", Coleoptera), Dytiscus sp. (Coleoptera), Formicidae, Lepidoptera and Hemiptera. Some felt-tip pen illustrations are also included.
