The leafbirds (Chloropseidae) are a family of small passerine bird species found in the Indian Subcontinent and Southeast Asia. They were formerly grouped with the ioras and fairy-bluebirds in the family Irenidae. As presently defined, the leafbird family is monogeneric, with all species placed in the genus Chloropsis.
Leafbirds are always found in trees and shrubs. Most are restricted to evergreen forests except the golden-fronted leafbird and Jerdon's leafbird which live in deciduous monsoon forests, and the orange-bellied leafbird, which occurs in deciduous forests. Within this requirement, they occupy all broadleaf forest types in the Indian Subcontinent and Southeast Asia. The highest altitude they occur at is 2500 m (8200 feet). Some species, such as the blue-masked leafbird, have montane distributions, rarely descending below 1000 m.
The orange-bellied leafbird and the golden-fronted leafbird are amongst the more widespread species, with large ranges across mainland Asia. Some species have more restricted distributions, such as the yellow-throated leafbird, which is endemic to the Philippine island of Palawan, and the Bornean leafbird, restricted to northern Borneo. In general there are seldom more than three species occurring in the same area, although five species co-occur in the submontane forests of Sumatra. Co-occurring species are usually well-spaced on the spectrum of size, to reduce competition.