Brightly-colored barbet restricted to the Annamite Range of southern Vietnam and southeastern Laos, where it inhabits hill and montane forests. Like other barbets, often sticks close to dense foliage in the canopy, where it can be difficult to see; listen instead for its echoing hiccuping song, which has a frog-like quality. If seen well, note the leaf-green body, thick black mask and “eyebrow”, red forehead, and bright yellow throat and crown. Namesake “necklace” consists of a thin black line across the throat which can be difficult to see. Very similar to closely-related Golden-throated Barbet, but ranges do not overlap.