| Titre : | British Birds 104(4) - APR 2011 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Michael Shrubb, Auteur
Early documentary evidence provides good reason for believing that the Great Bustard Otis tarda did not colonise Britain until around the mid fifteenth century. This was perhaps part of a general increase in Europe and rooted in major ecological[...]
Article
Andrew D. M. Dobson, Auteur ;
Michele L. Clarke, Auteur
The Hen Harrier Circus c. cyaneus and Northern Harrier C. cyaneus hudsonius are classified as conspecifics by some modern authors and as separate species by others. The tendency to treat the two as conspecifics may have its origin in erroneous n[...]
Article
Graham W. Rebecca, Auteur
Over 1,000 Merlin Falco columbarius nest records were analysed following a national survey in Britain in 1993-94. The broad-scale principal habitat, altitude and nest-site were assessed in relation to clutch size, successful brood size and produ[...]
