IUCN Red List data observations

The table below lists IUCN-assessed species and other taxa from the IUCN API where none of the taxon's assessments is flagged as the current (latest) one. This commonly happens when a taxon was removed from the Red List, merged into another taxon, or reclassified, so only historical assessments remain. The most recent assessment is shown for context. The count is a minimum: it covers the taxa retrieved from the API, which may not be every taxon in the release.

None of these taxa is in the 2026-1 CSV export, so each is genuinely absent from the current release rather than a current taxon missing a flag. The list sorts most recently assessed first. A taxon last assessed in the past few years is most likely a taxonomic change made since, and is the easiest to confirm; one last assessed in 1996 or 1998 has stayed in this state through every release since. The Scope column separates taxa whose only assessments were regional (Europe, the Mediterranean, Pan-Africa) from taxa that once had a global assessment.

Why it matters

These pages are easy to mistake for current assessments on the Red List website. Many do not come up through search on iucnredlist.org, yet each stays reachable through its direct species URL. Some of the pages include a note such as "(This concept is no longer recognised)", but it is easy to overlook, and many have no such note at all.

Suggestion

• For any taxon which was removed, merged, or reclassified: create a new Not Evaluated (NE) assessment for the taxon. The NE "assessment" becomes the current assessment. This will show it's no longer assessed by the IUCN, and do so in a way consistent with the rest of the Red List data and site.
• If the taxon is still valid, flag its most recent assessment as current.
• Update how old assessments display on the website so they cannot be mistaken for the current one. Have old assessment pages include a link to the current assessment or make it clear when there is none.