Tiny, scarce, and very local hummingbird restricted to humid forest and shade-coffee plantations in foothills of Sierra Madre del Sur, Guerrero. Feeds quietly at middle to high levels in flowering trees. Feeding flight is slow and insectlike, flying with tail cocked and showing off big white to buffy-white band across lower back—easily passed off as a big bee or moth. Male has short, spiky orange crest, green throat, and rusty tail sides. Female rather drab, with dull orange forehead, and dingy whitish underparts.