White-winged Widowbird
Euplectes albonotatus
The white-winged widowbird is 15 to 19 cm (5.9–7.5 in) in length and about 23 g (0.81 oz) in weight. The male is the only short-tailed widowbird in its region with white on its coverts. The breeding male is distinguished from the yellow-mantled widowbird by its shorter tail, wing color, lack of yellow on its back, and paler bill. Females are pale below.
ID text from Wikipedia, CC BY-SA 4.0
Yellow Bishop
Euplectes capensis
The yellow bishop is a stocky 15 centimetres (5.9 in) long bird. The breeding male is black apart from his bright yellow lower back, rump, and shoulder patches, and brown edging to the wing feathers. He has a short crest, thick conical black bill, and a relatively short tail. His bill size varies dramatically between races. In non-breeding plumage, the black plumage is replaced by heavily streaked buffy-brown, and the bill is pale. The yellow shoulders and rump remain, and are a distinction from the female which lacks the contrasting colour patches. Voice: Calls include zeet zeet zeet, and a harsh zzzzzzt given by the male in flight. The song of the isolated SW Cameroon phoenicomerus is quite different: a dry rattle followed by swit-err, swit-err.
ID text from Wikipedia, CC BY-SA 4.0

Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: White-winged Widowbird and Yellow Bishop.