| epidemiology of salmonellosis in garden birds in england and wales, 1993 to 2003. | salmonellosis has been reported as an important cause of mortality of garden birds in several countries, including norway and scotland. we investigated the frequency of the disease in garden birds submitted for postmortem examination by members of the public in england and wales between 1993 and 2003, inclusive. we found salmonellosis to be the most frequent cause of death due to infectious disease in the garden birds submitted. this disease was confirmed in 7 of the 45 bird species that were ex ... | 2010 | 20945078 |
| widespread local house-sparrow extinctions. | house-sparrow populations have declined sharply in western europe in recent decades, but the reasons for this decline have yet to be identified, despite intense public interest in the matter. here we use a combination of field experimentation, genetic analysis and demographic data to show that a reduction in winter food supply caused by agricultural intensification is probably the principal explanation for the widespread local extinctions of rural house-sparrow populations in southern england. w ... | 2002 | 12198534 |