Black-throated Coucal (Centropus leucogaster)

Range complementary to that of C. anselli, suggesting that the two may be sister-species, a possibility supported by mtDNA data#R. Race neumanni has been considered to be more closely related to C. anselli. Further, neumanni has been proposed as a distinct species#R, on basis mainly of size, but size overlap occurs and, moreover, size differences are greatly exaggerated in illustration in HBW (in fact, neumanni is only 1 cm less in wing and 2 cm less in tail than nominate#R); such treatment appears inappropriate, at least on present evidence#R. Race from Cameroon and Gabon sometimes misspelt efulensis (e.g. in HBW), but correct original spelling is efulenensis#R. Three subspecies recognized.