In the past, sometimes placed in genus Sphenurus. Closely allied to T. sieboldii, T. permagnus and T. formosae, and more distantly to T. oxyurus species-group. Race korthalsi formerly considered a distinct species on basis of emarginated third primary, but this feature subsequently found in some birds of other races of present species. Birds from C Vietnam formerly assigned to race annamensis, but that name invalid, as preoccupied, and replaced by delacouri. Race etorques sometimes subsumed within korthalsi, but appears sufficiently distinct in plumage to warrant recognition#R#R. Proposed race yunnanensis included in nominate. Five subspecies recognized.
Food and feeding
Status and conservation
Only subscribers are able to see the bibliography. Login or Subscribe to get access to a lot of extra features!