IUCN Red List data observations

The table below lists IUCN species, subspecies, and varieties whose scientific name the Catalogue of Life records as a synonym of a different accepted name. That accepted name is shown in the CoL accepted name column. Rows where IUCN in turn lists the CoL accepted name as its own synonym are on Name pairs where IUCN and the Catalogue of Life differ on which name is accepted instead.

The Name used on Wikidata and Wikipedia column says which of the two names those sources use for the taxon: the CoL name, the IUCN name, both (usually one redirecting to the other), or neither. Neither source is an authority, but each is a third party that chose one of the two names. Blank means the taxon has no Wikidata item and no English Wikipedia article, or the check did not run.

Why it matters

Where CoL has moved a name into synonymy, the IUCN name may be an earlier combination of the same species, or a taxon that has since been merged into another. Databases that follow the Catalogue of Life file the taxon under the accepted name, not the IUCN one.

Suggestion

Compare each IUCN name with the CoL accepted name and confirm which reflects current taxonomy. Rows where Wikidata and Wikipedia already use the CoL name sort first; those are the likeliest to need a change.