It may seem an odd choice of walk, but this morning Andrew and I walked along a road that leads to a sand quarry about 6 kms along the Terekeka road. I'd looked on Google Maps, which showed that the road passes through a marsh just before the quarry. Early on, there were lots of lorries, but once they had all reached the quarry the walk was more peaceful.
The marsh came up trumps with a displaying warbler that I originally took to be a Fan-tailed Warbler Schoenicola brevirostris. However, further research online shows that it is a Little Rush Warbler Bradypterus baboecala. It was too distant to photograph well.
Later, we found Common Waxbill, and then a flock of Zebra Waxbills flew overhead. These were also new species for me in South Sudan, making three new birds in a day after I've lived here for nearly two years. Amazing!
Common Waxbill (taken through long grasses with 500mm lens on manual focus)
The indigobird mystery did not unravel at all. There were a number of Red-billed Firefinches, but the indigobirds did not have red legs and so were seemingly not Vidua chalybeata, which parasitises Red-billed Firefinch. I did not see any of the host species that are parasitised by other indigobird species that might occur here. The viduas I saw seem to have a blueish purple sheen, as shown in the second photo below (I've used colour saturation to exagerate the sheen).
Female Red-billed Firefinch
Male indigobird (with female partly in view)
Same indigobird [photo added in response to comment]
Immature Western Banded Snake-Eagle
Male Little Weaver
Displaying Beautiful Sunbirds
Probably Colotis protomedia (three butterflies with black markings); Eureme hecabe (yellow butterflies); yellow and brown butterfly: i.d. uncertain
5 star accommodation for White-rumped Swifts