IUCN Red List data deficient species (Chordata)

Please stick to IUCN Red List [1] when you add or remove species, subspecies, varieties, stocks or sub-populations. Binomial and trinomial nomenclature should be used, no more. To get more clarity, surname of scientific authority should be ignored.

As of August 2023^[update], the IUCN Red List of Threatened Species identified 8509 data deficient species in the Chordata phylum (Animalia kingdom).