English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/64764
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


The decline of the rook corvus frugilegus wintering population in spain: A new case of 'short-stopping'? | La graja corvus frugilegus deja de invernar en Espana: ¿Un nuevo caso de acortamiento en las migraciones'? the decline of the rook corvus frugilegus wintering population in Spain: A new case of 'short-stopping'?

AuthorsRomán, Jacinto ; Gutiérrez, Carlos
Issue Date2008
PublisherSociedad Española de Ornitología
CitationArdeola 55: 229- 235 (2008)
AbstractWintering Rooks were commonplace in Spain at the beginnings of the 20th century. In the seventies the wintering population was still present in both the southern and northern plains and in the Ebro Valley. In the winter 2004-05, a maximum count of only 100 birds in two roosts was recorded, one in Valladolid and another one in La Rioja. In the winter 2006- 07, only a flock of 50 birds wintered in the Rioja. Migratory Rook populations tend to make shorter movements from the breeding sites to new, more northerly, wintering grounds. This means a definitive isolation of the Leon breeding population, making it more vulnerable.
Appears in Collections:(EBD) Artículos
Files in This Item:
File Description SizeFormat 
ardeola.pdf1,52 MBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.