The white-bellied imperial pigeon (Ducula forsteni ) is a species of bird in the pigeon family Columbidae. First described by the French ornithologist Charles Lucien Bonaparte in 1854, it is endemic to Indonesia, where it is found on Sulawesi, Buton, Taliabu, Togian, and Peleng. It inhabits primary forest, dense secondary forest, and isolated areas of hill forest. A large pigeon with a long tail, it measures 42.5–51.5 cm (16.7–20.3 in) long and weighs 510 g (18 oz) on average. Males are mainly green, with pale-grey heads and bellies, chestnut vents, and a pale grey tail band, along with a red orbital ring. Females are nearly identical, but have darker grey areas in their plumage.
The white-bellied imperial pigeon feeds on fruit. It is listed as being of least concern by the International Union for Conservation of Nature (IUCN) on the IUCN Red List due to its sufficiently large range and lack of significant population decline. However, its population is declining due to habitat destruction.
The white-bellied imperial pigeon is a very large, boldly marked pigeon with a long tail, measuring 42.5–51.5 cm (16.7–20.3 in) long and weighing 510 g (18 oz) on average. Its upperparts and breast are mainly dark green, with bronze-red glossing, especially on the mantle. The head is pale grey, becoming white on the forehead and throat, while the breast and belly are white with a pink or cream tinge. The undertail coverts are dark chestnut, while the outside of the tail has a pale grey band across the centre. The iris is yellow or orange with a darker red or orange orbital ring. Its bill is black, with feathering on the top of the cere, and the feet are purplish. Females are nearly identical to males, but have darker grey in the plumage.
The white-bellied imperial pigeon may be confused with the grey-headed imperial pigeon, but the latter species is smaller, has a narrower and darker tail band, and more uniform grey upperparts and head. It also lacks green on the breast and white on the belly, along with having greenish instead of red orbital skin. The green imperial pigeon may also be confused with the white-bellied imperial pigeon, but has wine-grey head, neck, breast and abdomen, chestnut on the nape, and lacks a tail band.
The white-bellied imperial pigeon is endemic to Indonesia, where it is found on Sulawasi, Buton, Taliabu, Togian, and Peleng. It inhabits primary forest and dense secondary forest in mountains or along the coast, along with isolated areas of hill forest. It is found at elevations of 150–2,200 m (490–7,220 ft), but is most common at elevations of 800–1,600 m (2,600–5,200 ft).
The white-bellied imperial pigeon is mostly seen singly or in pairs, but also in small flocks near fruit trees. It is most easily seen while flying over the canopy, high in tall trees, or in smaller trees along forest edges. Its flight is heavy, with deep and slow wingbeats.
The white-bellied imperial pigeon feeds exclusively on fruit. Flocks of up to 30 birds can form at fruiting trees, especially figs.
The white-bellied imperial pigeon is listed as being of least concern by the International Union for Conservation of Nature (IUCN) on the IUCN Red List due to its sufficiently large range and lack of significant population decline. However, its population is thought to be declining due to habitat loss. It is moderately common overall on Sulawesi, being locally common in some areas, and uncommon on Taliabu.
