On 12th July at 1800 hours, two Pied Imperial-pigeons (Ducula bicolor) flew silently to the same Alexandra Palm (Archontophoenix alexandrae) that was visited by three of them two days earlier (above). One flew off about a minute later. The other remained for another two minutes. During these three minutes the second imperial-pigeon frantically picked and swallowed a total of 34 fruits (below).
Flying from the Alexandra Palm, the second imperial-pigeon landed on the nearby Ceram Palm (Rhopaloblaste ceramica). Apparently the other bird was already there. Unlike the hectic feeding earlier, they took their time choosing and picking the fruits. These larger fruits were also swallowed whole (below).
The pair remained on the Ceram Palm for about 3.5 minutes before flying off. One of the imperial-pigeons swallowed a total of 8 fruits while the other only 3 (as it arrived earlier it must have swallowed a few more but this was not observed) and discarded a few that landed near to where I was standing below. On examining the discarded fruits, I found that much of their outer layer of pulp had already been removed earlier by other birds.
Based on ten fallen fruits collected from beneath each palm, the mean weight and dimensions of the Ceram Palm (above) are 50g and 30x20x18mm while those of Alexandra Palm (below) are 5g and 13x11x11mm. In term of weight, the former is about ten times heavier.