Angola, Benin, Cameroon, Central African Republic, Congo [The Democratic Republic of the], Congo [The Democratic Republic of the], Côte dIvoire, Equatorial Guinea, Gabon, Ghana, Guinea, Liberia, Nigeria, Sierra Leone, Tanzania [United Republic of], Togo, Uganda.
Sierra Leone, southern Guinea and Liberia east to southern Ghana, and from southern Nigeria and southern Cameroon south, incuding Bioko I (Fernando Póo), to PRCongo and east to south-western Central African Republic, DRCongo (except south-east), western and southern Uganda and extreme north-eastern Angola.
Population
Estimated population is unknown (2010).
Grey Longbill (Macrosphenus concolor) [XC396783]
by Mike Nelson from Kakum NP (walkway), Ghana (song)
Grey Longbill (Macrosphenus concolor) [XC347790]
by Bram Piot from Parc National du Banco, Ivory Coast (song)
Subspecies
No subspecies.
Along with Yellow Longbill (Macrosphenus flavicans) and Kemp's Longbill (Macrosphenus kempi) have in the past been considered to be babblers (Timaliidae). Forms a superspecies with Pulitzer's Longbill (Macrosphenus pulitzeri). Eastern populations (DRCongo and Uganda) described as a geographical subspecies, grisescens, but considered not diagnosable.
BirdLife International Species Factsheet