A study of the molecular phylogeny of bishops and widowbirds published in 2008 found that it formed part of a clade along with the Fire-fronted Bishop (E. diadematus), Black-winged Red Bishop (E. hordeaceus), Northern Red Bishop (E. franciscanus), Southern Red Bishop (E. orix), Zanzibar Red Bishop (E. nigroventris) and Red-collared Widowbird (E. ardens).
Northern Ireland | Bishop | Red Army | bishop | International Red Cross and Red Crescent Movement | American Red Cross | Red Hot Chili Peppers | Northern Territory | Red Sea | Bishop (Catholic Church) | Red Star Belgrade | Red | Little Red Riding Hood | Bishop of Winchester | Bishop of London | Northern Pacific Railway | Detroit Red Wings | Red Bull | titular bishop | Red River | Red Hat | Kimberley, Northern Cape | Bishop of Durham | Red Dwarf | Northern Illinois University | Northern Cape | Northern England | International Committee of the Red Cross | Army of Northern Virginia | Red River of the North |