Mark Chua had an exciting encounter with a flock of more than ten Pied Imperial Pigeons (Ducula bicolor) that descended on a palm tree in a garden in July 2008.
The palm appears to be a fan palm (Livistona sp.), whose ripe fruits are bright orange, each with a large seed. The pigeons obviously swallowed the fruits whole, the gizzard scraping off the flesh. And what about the seeds? My guess is that they would be regurgitated after a short while. Smaller seeds would pass through the gut to be ejected at the other end, but not large seeds.
The Pied Imperial Pigeon is a rare, non-breeding visitor to Singapore but a resident to Malaysia.
An earlier account of birds regurgitating seeds can be viewed HERE.
Images by Mark Chua.
This post is a cooperative effort between www.naturepixels.org and BESG to bring the study of bird behaviour through photography to a wider audience.