Family Crombecs and allies (Macrosphenidae)

Least Concern

Grey Longbill (Macrosphenus concolor)


French: Nasique grise German: Einfarb-Bülbülgrasmücke Spanish: Picolargo gris

Camaroptera concolor


, 1857,



Thought to be closely related to M. pulitzeri. E populations (DRCongo and Uganda) described as race grisescens, but not reliably diagnosable. Monotypic.


Sierra Leone, S Guinea and Liberia E to S Ghana, S Nigeria and S Cameroon S, including Bioko, to Congo and E to SW Central African Republic, DRCongo (except SE), W & S Uganda and extreme NE Angola.

Descriptive notes

11–12 cm; 12–16 g. A rather small, nondescript, greyish-olive warbler with shortish tail. Top and side of head, upperparts, upperwing-coverts and tail are dull... read more


Song cheerful and sustained, composed of varied mainly two-part phrases, some hurried and bubbling... read more


Old secondary forest, primary forest, riparian forest and forest edge. Mainly lowlands, but to 1220... read more

Food and feeding

Insects, including moths and small caterpillars (Lepidoptera) and small grasshoppers (Orthoptera). Forages at all levels, from undergrowth... read more


Dependent juveniles observed in Mar and Apr in Liberia. One nest stated to be 2·5 m above ground in a liana. No other information.



Status and conservation

Not globally threatened (Least Concern). Common in many areas. Fairly common in Liberia, where highest densities recorded in depleted impenetrable high forest with secondary... read more

Recommended citation

Pearson, D. (2019). Grey Longbill (Macrosphenus concolor). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 24 February 2019).