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IUCN
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Mandrici A., Robuchon, M. Delli G., Battistella L. Dubois G., Species Richness Maps and Spatial Services computed using the IUCN Red List of Threatened Species. Version: 2021-3 (Dec 2021). https://www.iucnredlist.org.
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Creative Commons Attribution-Non Commercial-No Derivatives 4.0 International
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2022
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Annual
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Global
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300m
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The IUCN Red List of Threatened Species (www.iucnredlist.org) is the world’s most comprehensive information source on the global conservation status of animal, fungi and plant species. It contains a rich compendium of supporting information of the distribution range, ecological requirements, habitats and threats to species and on conservation actions that can be taken to reduce or avoid extinctions.
This map is based on the IUCN ranges (version 2021-3) for birds. The raw ranges (geographic limits of a particular taxon's distribution) have been rasterised and summed across all species to show the number of species potentially occurring in each pixel.
More details on IUCN Red List species selection and processing: https://www.iucnredlist.org/resources/other-spatial-downloads#species_selection_and_processing
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As the species ranges have not been refined by altitude and landcover (i.e. Area of Habitat), there may be a fair amount of unsuitable habitat in the raw ranges, resulting in errors of commission.
Global species maps from the red list represent current, known limits of distribution for individual species within their native historical range. Although these maps have many uses, they generally have a coarse resolution and consequent limitations. Species ranges are mapped as generalized polygons which often include areas of unsuitable habitat, and therefore species may not occur in all of the areas where they are mapped. In general, for range-restricted taxa, ranges are mapped with a higher degree of accuracy, sometimes down to the level of individual subpopulations, compared with more widely distributed species.
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Species Richness - Sharks and Rays
