Male and females are bright green overall, but the male has a black-and-blue throat while the female sometimes shows a slight yellow tinge to the throat. The Lesser Green Leafbird is very similar in appearance to the Greater Green Leafbird, but note that the male Lesser Green Leafbird has a smaller black mask and traces of yellow on the forehead. Lack of blue traces in the wings distinguishes this species from the otherwise similar Blue-winged and Bornean Leafbirds. Inhabits lowland primary and secondary broadleaf evergreen forests, as well as adjacent plantations and large parks. Joins mixed-species foraging flocks, usually in the canopy.