Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical mangrove forests, and subtropical or tropical moist montane forests. Pink-necked Green Pigeons eat mainly fruits. Their colourful attire allows them to blend perfectly in the foliage of fruiting trees. Figs are their favourite, but they also eat palm fruit and berries, and nibble on buds. In Sungei Buloh, their favourite food include the fruit of the Macaranga, Cherry Tree, small banyan figs, and Singapore Rhododendron. Like other Green Pigeons, they are arboreal and seldom come the ground except to drink, although they may snack on berries of low bushes. Pink-necked Green Pigeons are the only Green Pigeons found commonly outside the primary forest. They prefer habitats with trees that provide fruits as well as a safe perch including mangroves, scrub, secondary forest, forest edge. Pink-necked Green Pigeons forage most actively in the early morning. Although they may feed in flocks of up to 30 in a fruiting tree, males especially may defend small patches from others in the flock. Pink-necked Green Pigeons tend to roost together and a site may attract hundreds of birds from a wide area and become a traditional roost. Favoured roosting sites are tall trees in swamps and mangroves. But they nest alone and not in large colonies. The male Pink-necked is very handsome and colourful. The duller female is easily confused with those of other Green Pigeons and is best identified by her male consort who is usually nearby.