Red-tailed Greenbul (Criniger calurus) [XC553752]
by Peter Boesman from Bwindi Impenetrable National Park, Kanungu, Western Region, Uganda (call)
Red-tailed Greenbul (Criniger calurus) [XC739617]
by Peter Boesman from Budongo Eco lodge, Uganda (call)
Subspecies
Has often been regarded as conspecific with White-bearded Greenbul (Criniger ndussumensis) owing to similarity in appearance, but the two differ both vocally and morphologically. Published reports of hybridization between White-bearded Greenbul (Criniger ndussumensis) and subspecies emini of present species in north-eastern DRCongo seem to be based on observation of individuals apparently showing combination of characters then thought to be restricted to each form.
The following 3 subspecies are recognised:
verreauxi Sharpe, 1871 - South-western Senegal and south-eastern Guinea-Bissau east to south-western Nigeria.
calurus (Cassin, 1857) - South-western Nigeria east to western DRCongo, also Bioko I.
emini Chapin, 1948 - Western DRCongo and north-eastern Angola east to Uganda and western Tanzania.