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The effect of supplementary winter seed food on breeding populations of farmland birds: evidence from two large-scale experiments |
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| Authors: | GAVIN M. SIRIWARDENA,DANAË K. STEVENS&dagger ,GUY Q. A. ANDERSON&dagger ,JULIET A. VICKERY,NEIL A. CALBRADE, STEPHEN DODD&dagger |
| Affiliation: | British Trust for Ornithology, The Nunnery, Thetford, Norfolk IP24 2 PU, UK;and;Royal Society for the Protection of Birds, The Lodge, Sandy, Beds. SG19 2 DL, UK |
| Abstract: | |
| Keywords: | agri-environment schemes buntings farmland biodiversity finches overwinter survival population declines sparrows |