Green-headed Sunbirds. Female (forward) and male (suspected, behind). Spotted in a garden in Kampala, Uganda. The dark shadowing on the male is likely responsible for the breast's plumage apearing black rather than white. Given the location its is unlikely to be a Blue-headed Sunbird.
<a href="//commons.wikimedia.org/wiki/User:Jgdb500" title="User:Jgdb500">Jgdb500</a>
<span class="int-own-work" lang="en">Own work</span>