viridis (Müller, 1776) - Extreme southern Mauritania, Senegal and Gambia south to Sierra Leone.
ferreti (Guérin-Méneville, 1843) - Mali and Ivory Coast east to northern Cameroon, southern Chad, northern Central African Republic, Sudan, northern Eritrea and Somalia, south to north-eastern DRCongo, southern Kenya and north-eastern Tanzania.
harterti (Meinertzhagen, R, 1923) - Extreme south-western Saudi Arabia, western and eastern Yemen and southern Oman.
speciosa (Cassin, 1859) - Southern Cameroon east to south-western Sudan, south to DRCongo and north-eastern Angola.
restricta (Salomonsen, 1933) - Southern Uganda.
kivuensis Salomonsen, 1949 - South-western Uganda, Rwanda, Burundi, eastern DRCongo (Kivu) and north-western Tanzania.
suahelica Reichenow, 1898 - Western Kenya and northern Tanzania.
ungujaensis (Grant, CHB & Mackworth-Praed, 1947) - Eastern Tanzania, including islands of Zanzibar, Mafia and Pemba.
plumbeiceps Reichenow, 1898 - Breeds Angola and northern Namibia east to south-western Tanzania, Mozambique and northern South Africa. Non-breeding also north to Cameroon, southern DRCongo and south-eastern Kenya.
granti (Roberts, 1948) - Breeds eastern and southern South Africa (KwaZulu-Natal south to southern western Cape). Non-breeding north to Zimbabwe and Mozambique.
BirdLife International Species Factsheet