Thick-billed Green-Pigeon Treron curvirostra

Brightly-colored and thickset pigeon of the forest canopy, usually seen flying over in pairs or small groups. Distinctive bicolored bill and bright green eyering are visible even from a distance. Both sexes are mostly green. Males have maroon backs, while females are green all over; both have jagged bright yellow striping on the wing edges. Flocks are seen in fruiting trees in lowland and foothill forests, where they often associate with other green pigeons. Gives smoothly undulating “woooOOOO”, often in series.