East Africa = Ndi, Teita.
Until recently considered conspecific with Z. abyssinicus, but differs genetically#R and by its yellow vs grey or greyish-white mid-breast to tarsal feathering (3); all-black vs mid-horn bill with pinkish base (3); brighter, greener vs duller, greyer upperparts (at least 1); slightly smaller size with shorter bill (effect size for male bill –2.72, score 2); rising vs downslurred elements in rattle-call (allow 1) and burrier tone to “plaintive” call (allow 1), but voices of some taxa unrecorded so vocal differences not yet definitive. Race jubaensis seems very weakly distinct and perhaps merits synonymization. Two subspecies recognized.
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