Orange-breasted Green Pigeon
Treron bicinctus
Similar in appearance to other green pigeons including the yellow-footed green pigeon and the grey-fronted green pigeon but has no maroon on the wing. The male does not have any grey on the head but has a narrow band of lilac on the upper breast with a broader orange band below. The undertail-coverts are cinnamon with the longer feathers edged yellow. The tail is grey above with a broad subterminal dark band. The females are yellow below and lack the orange or lilac bands. The undertail coverts are duller cinnamon with greenish spots.
ID text from Wikipedia, CC BY-SA 4.0
Thick-billed Green Pigeon
Treron curvirostra
Rather small-sized pigeon being under 26 cm (10 in) as compared to other green pigeons. A thick pale greenish bill with red base, broad bluish-Green eye ring, grey crown and maroon mantle diagnostic. Wings have black primary and secondaries with yellow outer edge. Underside green in both sexes. Thighs dark green with whitish scales. Female has greenish undertail coverts with whitish scales. Males have maroon dorsum and dull chestnut undertail coverts.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Orange-breasted Green Pigeon and Thick-billed Green Pigeon.