A loud, fluorescent green bird of tropical evergreen forests, usually found in small and medium-sized flocks. Adult is vivid green with a black mask, bright cinnamon flight feathers, and a cherry-red bill. Southern populations in Southeast Asia have a yellow breast and belly; Chinese birds have completely green underparts. Despite bright colors, can be difficult to see in the canopy; most easily seen as it sails through gaps in the foliage. Vocalizations incorporate ringing whistles, rasping notes, screeches, and noisy chattering.