Scottish Crossbill National Survey in the UK in 2008
Citation
Royal Society for the Protection of Birds (2023). Scottish Crossbill National Survey in the UK in 2008. Occurrence dataset https://doi.org/10.15468/rvh2gx accessed via GBIF.org on 2024-12-10.Description
These are the results of the first national survey of Scottish Crossbill, in 2008. Common Crossbill and Parrot Crossbill were also included in the survey. This provides the first estimate of the global population of Scottish Crossbill.
This survey was funded by the Royal Society for the Protection of Birds (RSPB) and Scottish Natural Heritage (SNH), and was conducted as part of the SCARABBS (Statutory Conservation Agencies and RSPB Breeding Birds Scheme) programme of surveys.
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 errors.Method steps
-
Sampling was based on 1 km grid squares, containing coniferous woodland at their centre; every fourth square was surveyed, resulting in 852 survey sites. Crossbills were lured to the sampling points by playing a Crossbill excitement call from a CD player. The responding birds were counted, and their calls recorded. No attempt was made to identify the Crossbill species in the field. Crossbill species were identified as Scottish Crossbill, Common Crossbill or Parrot Crossbill by playing back their calls, and identifying species-specific call-types. The species of crossbill at 63 locations could not be identified from the recordings; these records are present in this dataset as Loxia sp.
In order to verify records and validate the dataset, the data have been mapped and thoroughly checked. Geographical checks have included comparing the distribution with that shown in the published paper and ensuring that records with the same area name are located close to each other.
Taxonomic Coverages
Geographic Coverages
National survey: Scotland
Data are reported at 1 km resolution, where the grid reference denotes the bottom left hand corner of the grid square.
Data are reported at 1 km resolution, where the grid reference denotes the bottom left hand corner of the grid square.
Bibliographic Citations
Contacts
originatorRoyal Society for the Protection of Birds
metadata author
Royal Society for the Protection of Birds
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