Crossbills, Distribution survey in Great Britain, 1995-2005
Citation
Royal Society for the Protection of Birds (2023). Crossbills, Distribution survey in Great Britain, 1995-2005. Occurrence dataset https://doi.org/10.15468/0gghyo accessed via GBIF.org on 2024-10-09.Description
This dataset represents records collected between 1995 and 2005 as part of a wider study, which was then used to infer the breeding range of the Scottish Crossbill. The data were mostly collected between January and April in the years 1995-2005 when Crossbills can reasonably be assumed to be in a territory or breeding, however since the birds were only identified by calls breeding status can not be confirmed. The Scottish Crossbill was once thought to be a subspecies of either the Common Crossbill or the Parrot Crossbill but is now thought to be Britain's only endemic bird species. A full survey was also carried out in 2008. This survey was funded by the RSPB.Purpose
Sampling Description
Quality Control
These data have been gathered by trained field-workers and the data are of a high quality. These data have been mapped and checked for sensitivities and typographical/geographical errorsMethod steps
- The study was carried out from 1995-2005 during January and April when it can be reasonably assumed Crossbills are either in a territory or breeding. All 10 km squares north of 56 degrees and 50 minutes north, containing more than 20% woodland, were surveyed. In general, the larger woods were searched until at least 1 crossbill had been recorded. Multiple recordings from the same 10KM grid square were restricted to a few squares. Crossbills were lured using a characteristic excitement call broadcast from mini speakers. Lured birds are usually vocal and both flight and excitement calls can be tape recorded using a directional microphone. Sonograms were made from the tape recordings allowing species identification.
Taxonomic Coverages
Geographic Coverages
All the 10 km squares north of 56 degrees and 50 minutes north, containing more than 20% woodland, were surveyed. This dataset includes some additional data collected in Wales and Eastern England which were not used in the published paper
Bibliographic Citations
Contacts
originatorRoyal Society for the Protection of Birds
The Lodge
Potton Road, Sandy
SG19 2DL
Bedfordshire
Telephone: 01767 680551
email: Dataunit@rspb.org.uk
homepage: http://www.rspb.org.uk/
metadata author
Royal Society for the Protection of Birds
The Lodge
Potton Road, Sandy
SG19 2DL
Bedfordshire
Telephone: 01767 680551
email: Dataunit@rspb.org.uk
homepage: http://www.rspb.org.uk/
distributor
NBN Atlas
27 Old Gloucester St, Holborn
London
WC1N 3AX
London
GB
email: admin@nbnatlas.org
Conservation Data Management Unit
administrative point of contact
email: dataunit@rspb.org.uk