What information on species is available through the Data Zone?
 Dr Tony Martin
Red-breasted Goose: uplisted to Endangered in the IUCN 2007 Red List
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For all Globally Threatened Birds (those listed as Critically Endangered, Endangered, Vulnerable and Extinct in the Wild), the factsheets contain information on identification, range and population, ecology, threats, conservation measures underway and conservation measures proposed. A second page of additional data tables is available for all these species giving the IUCN Red List criteria under which the species qualifies, the history of categories assigned to it in assessments since 1988, details of its range, population size and population trend, distribution details for each country it occurs in, habitat preferences, altitude, and the threats facing the species and their potential impact.
For species in the categories of Near Threatened, Data Deficient, Extinct, and Extinct in the Wild, the factsheets contain a summary account of the species's status, plus additional data tables for IUCN Red List history since 1988, country distribution, and habitat.
For species with Red List categories that have been revised since 2004, the factsheets incorporate (as far as possible) published and unpublished information received up to March of the year they were revised. For all other species, the factsheets contain published material up to September 2003 and unpublished information received up to January 2004. The conservation measures proposed are largely based on those published in 2000, as a comprehensive review is planned in future.
For all c.8,000 species evaluated as Least Concern, the factsheets give a summary of the range size, population size and trend information where known, and a justification for the evaluation as Least Concern. This is the first time such information has been provided. The summary is in many cases a preliminary (and incomplete) collation of available material, and will be expanded in due course. The additional data tables give the IUCN Red List history, country distribution and habitat preferences. Country distribution has been collated from various sources, including, in particular, the database held by UNEP: WCMC. Habitat preferences have also been collated from a range of sources including regional field guides and bird family handbooks, plus Stotz et al. (1996) for Neotropical species.
BirdLife would be grateful to receive updated information or correction of any errors in the species factsheets and additional data tables: please click the link at the end of each factsheet.