|
|||||
|
|
Farmland birds and late winter food: does seed supply fail to meet demand? |
|
| Authors: | GAVIN M SIRIWARDENA NEIL A CALBRADE & JULIET A VICKERY |
| Institution: | British Trust for Ornithology, The Nunnery, Thetford, Norfolk IP24 2PU, UK |
| Abstract: | |
| Keywords: | agri-environment schemes buntings finches granivorous birds supplementary feeding survival |