Emerald Starling (Lamprotornis iris)

its small size, well-camouflaged and skittish nature makes it one of the most difficult birds to photograph in Heart of Africa

here's a list of starlings in HoA, based on how commonly encountered they are(imo):

1. Red-winged Starling
2. Superb Starling
3. Purple Starling
4. Violet-backed Starling
5. Golden-breasted Starling
6. Lesser Blue-eared Starling
7. Long-tailed Glossy Starling
8. Emerald Starling
9. Ashy Starling
10. Splendid Starling

Good photo of beautiful bird.