The purple grenadier is a common red-billed waxbill that is endemic to northeast Africa including all of central Tanzania. The top photo (Usa River, 5-20) is courtesy of Per Holmen; the right 3rd row photo (Serengeti) is courtesy of Brad Johnson. The other photos were taken in the Serengeti and Oldonyo Sambu. Click the image above to see 16 enlargements.