Grosbeak-Weaver
Amblyospiza albifrons
Near Chessup Falls, Elgeyo Escarpment, Kenya. Oct. 2017. The heavy bill, white wing patch and white on forehead are just barely visible.
From Wikipedia: Thick-billed Weavers, as they are also known, have particularly strong mandibles, which are employed to extricate the seeds in nutlets and drupes, and their songs are comparatively unmusical and harsh. Their colonial nests are readily distinguishable from those of other weavers, due to their form and placement, and the fine strands used in their construction.
Ploceidae -- Weavers and Bishops Family
Books:
- Birds of Kenya and Northern Tanzania by Zimmerman et al.
- Birds of East Africa by Stevenson and Fanshawe