Not a fact anymore

The king cobra is one widespread species, Ophiophagus hannah, found across South and Southeast Asia.

What we know now

A 2024 taxonomic revision recognizes four king cobra species: Ophiophagus hannah, O. bungarus, O. kaalinga and O. salvatana.

Why it changed

Genetic studies revealed deep geographic lineages within O. hannah. A later integrative revision combined those results with morphology and museum specimens, formally separating the lineages into four species.

Status: Reclassified
Category: Zoology
Accepted for: ≈188 years
Accepted approximately: 1836–2024
Changed approximately: 2024

For nearly two centuries, king cobras across a vast range from the Indian subcontinent to Southeast Asia were generally placed in a single species, Ophiophagus hannah. Regional differences were known, but they had not produced a formal species-level split.

Genetic work changed the picture by identifying four deeply separated geographic lineages. The 2024 revision then examined 153 whole or skeletal specimens, compared diagnostic anatomy and revisited the historical names attached to the group. It restricted O. hannah to one lineage, revived O. bungarus, and described O. kaalinga and O. salvatana.

The animals did not suddenly become different in 2024. Taxonomy changed because the accumulated genetic and morphological evidence supported recognizing evolutionary lineages that had previously been grouped under one name.

Evidence

Sources and what they establish

Primary research

Taxonomic revision of the king cobra Ophiophagus hannah species complex, with the description of two new speciesEuropean Journal of Taxonomy
Integrative formal revision of 153 specimens that recognizes four king-cobra species, restricts O. hannah and provides a diagnostic key.
Multilocus phylogeny and morphological analyses reveal four cryptic lineages within the king cobra Ophiophagus hannahMolecular Ecology
Provides the preceding molecular and morphological evidence for four independently evolving geographic lineages within the traditionally single species.

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