Data Sources and Methods for the Changes in Wildlife Species Disappearance Risks Indicator
3.1 Data source
Data are drawn from Committee on the Status of Endangered Wildlife in Canada (COSEWIC) Wildlife Species Status Reports, available at the Species at Risk Public Registry.
COSEWIC maintains a database of wildlife species assessment results, which were summarized for this indicator. A search can be made for wildlife species of interest at Wildlife Species Search.
Data contributing to the assessment of individual wildlife species are drawn from a wide range of sources, which are cited within the relevant status reports.
3.2 Spatial coverage
Regional representation is not considered when choosing wildlife species for assessment, although wildlife species with a small area of occupancy have greater priority. However, knowledge of wildlife species is greatest in southern Canada and in terrestrial systems, so these wildlife species are over-represented in the group of assessed wildlife species.
3.3 Temporal coverage
In general, wildlife species are reassessed every 10 years. The date of reassessment therefore varies widely within the dataset.
3.4 Data completeness
Data cover only the suite of wildlife species that have been reassessed and have sufficient data to be assessed.
3.5 Data timeliness
COSEWIC evaluates wildlife species twice per year; this indicator is current to the end of 2012.
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