Previously placed in Alcedo. Has often been considered a race of either C. leucogaster or C. cristatus; seems closer to former in habits and habitat, but more similar to latter in certain aspects of its plumage. Recent phylogenetic study found that nais is genetically very closely related to C. cristatus, sequence divergence between them being only 0.9%, suggesting that treatment of nais as a race of that species may be more appropriate#R; on the other hand, it differs noticeably from both cristatus and leucogaster in plumage details and morphology, and provisional treatment as a separate species is preferred here, pending further research. Monotypic.
Príncipe, in Gulf of Guinea.
Food and feeding
Status and conservation
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