Medium-sized, leaf-green inhabitant of lowland, foothill, and lower montane forests on Java. Male a triangular black throat patch with a deep blue center, as well as a pale yellow patch on the breast. Female is green all over with a small blue throat smudge. Both sexes have vivid blue highlights on the wings, which help to distinguish it from Greater Green Leafbird, which has plain green wings, as well as a pale yellow throat and eyering on females. Vocalizations varied, including a rather slow, simple song consisting of whistles and warbles, as well as shorter warbled series somewhat reminiscent of bulbul vocalizations.