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The slender-billed starling (Onychognathus tenuirostris) is a species of starling in the family Sturnidae. It is found in Burundi, Democratic Republic of the Congo, Eritrea, Ethiopia, Kenya, Malawi, Rwanda, Tanzania, Uganda, and Zambia.

The subspecies Onychognathus tenuirostris theresae is a "red-winged" starling  of high elevations, typically around moorland waterfalls where often in noisy flocks. Range : central Kenya highlands, especially Aberdares and mount kenya; also at Nyahururu and on Mau, Elgeyu and Kongelai escarpments.