A small typical ‘double-collared’ sunbird. Much smaller and shorter-billed than similar-plumaged Eastern Miombo Sunbird (and ranges hardly overlap); male Western Miombo has narrower red breast band, paler gray belly, and more prominent yellow wingpit tufts. Male Western Miombo also lacks the bluish-violet rump patch of Montane Double-collared Sunbird. Female and immature are dark gray with pale underwings. Singles and pairs are residents of Miombo woodland, gallery forest, and other woodland. Sings a series of jumbled notes ending in a long descending trill.