Yellow-billed Oxpecker
Buphagus africanus
Photographed at Maasai Mara, Narok County, Kenya. Oct. 2016.
From Wikipedia: The yellow-billed oxpecker is 20 cm long and has plain brown upperparts and head, buff underparts and a pale rump. The feet are strong. The adults' bills are yellow at the base and red at the tip, while juveniles have brown bills. Its flight is strong and direct. The call is a hissy, crackling krisss, krisss. These birds feed upon ectoparasites (e.g. ticks), but also take blood from the animals where they forage.
Sturnidae -- Starling Family
Books:
- Birds of Kenya and Northern Tanzania by Zimmerman et al.
- Birds of East Africa by Stevenson and Fanshawe