Swallow Hirundo rustica population trends in England: data from repeated historical surveys: The variation in population trends (−86% to +236%) between surveys during 1964–81 and in 1999 and 2000 can be explained by nest-site loss, and possibly agricultural intensification.

Author: Evans Karl L.   Wilson Jeremy D.   Bradbury Richard B.  

Publisher: Taylor & Francis Ltd

ISSN: 0006-3657

Source: Bird Study, Vol.50, Iss.2, 2003-07, pp. : 178-181

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