| Titre : | Bird Study 50 - JUL 2003 |
| Type de document : | Bulletin |
| Paru le : | 01/07/2003 |
Dépouillements
Article
G. Alessandria, Auteur ;
F. Carpegna, Auteur ;
M. Della Toffola, Auteur
Capsule We report on the courtship behaviour of the Eurasian Bittern from direct observation in rice fields.
Article
C. J. Bibby, Auteur
Capsule Field ornithology is alive and well, and in the future can contribute much more in Britain and elsewhere. Aims To review the progress of field ornithology in Britain in the context of Bird Study and the British Trust for Ornithology. Met[...]
Article
R. J. Thomas, Auteur ;
E. J. A. Drewitt, Auteur ;
D. J. Kelly, Auteur ;
N. M. Marples, Auteur ;
S. Semple, Auteur
Capsule Birds subjected to playbacks of conspecific song responded strongly by day in both Wales and Ireland, and strongly at night only in Wales. Aims To test the responses of Robins to conspecific playbacks between Wales and Ireland and betwee[...]
Article
K. L. Evans, Auteur ;
J. D. Wilson, Auteur ;
R. B. Bradbury, Auteur
Capsule 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.
Article
K. L. Fletcher, Auteur ;
K. C. Hamer, Auteur
Capsule Within-pair comparisons substantially improve the accuracy of sexing from biometrics for two congeneric species of seabird with monomorphic plumage and soft-tissue colouration. Aims To examine the extent to which statistical limitations [...]
Article
A. J. Green, Auteur ;
M. I. Sanchez, Auteur
This globally threatened species is less dependent on invertebrates and more dependent on seeds than other ducks. Aims To assess seasonal variation in Marbled Teal diet at two of the most important wetlands for the west Mediterranean population.[...]
Article
Article
J. W. Pearce-higgins, Auteur ;
D. W. Yalden, Auteur
Capsule The best estimate of breeding success was a mean of 0.57 fledglings per pair, which when combined with adult survival rates, successfully explained the observed population trend. Aims To quantify Golden Plover breeding success on a moor [...]
Article
J. Perez-Tris, Auteur ;
A. Ramírez, Auteur ;
J. L. Telleria, Auteur
Capsule Iberian Chiffchaffs Phylloscopus (collybita) brehmii are genetically, morphologically and bioacoustically different from European Chiffchaffs (P [c.] collybita). Aim To examine the difference in migratory pattern between brehmii and coll[...]
Article
M. Madders, Auteur
Capsule In west Scotland, the birds foraged in accordance with the distribution of prey and vegetation associated with early-growth conifer forests. Aims To investigate foraging Hen Harrier activity in relation to vegetation cover and structure [...]
Article
R. A. Phillips, Auteur ;
D. R. Cope, Auteur ;
E. C. Rees, Auteur ;
M. J. O'Connell, Auteur
Capsule Barnacle Geese restrict their movements to relatively few key sites and exhibit considerable variation in ranging behaviour. Aims To examine individual and seasonal variation in site fidelity, habitat use, range size and foraging strateg[...]
Article
R. B. Bradbury, Auteur ;
D. S. Allen, Auteur
Capsule Few positive responses by birds were observed in the first two years of this new agri-environment scheme. Aims To determine whether the pilot Arable Stewardship Scheme delivered increased populations of either breeding or wintering birds[...]
Article
P. J. Haynes, Auteur ;
I. R. Inglis, Auteur ;
T. J. Isaacson, Auteur ;
S. L. Fryday, Auteur
Capsule Woodpigeons range over greater areas during winter than summer with winter dispersion greatest in the first two winters following fledging. Aims To radiotrack Woodpigeons, to analyse the BTO ringing recoveries and to examine ranging beha[...]
Article
J. T. Garcia, Auteur
Capsule The intensity of parental defence, irrespective of the value of offspring, may be one of the proximate causes of breeding success, reflecting the quality of breeders.' Aims To test whether female Hen Harrier investment in defence towards[...]
Article
J. M. Marcos, Auteur ;
V. Baglione, Auteur
Capsule Adoptions occurred at low rate (2.6% of successful nests and 1.1% of fledglings), probably as a result of a mistake in early offspring recognition.
