I don't believe there is any connection between the Flycatcher/Niltava and the Green Pigeon. The Flycatcher/Niltava arrived last Saturday or possibly Friday. The Niltava has always been easy to find although not so the Flycatcher.
The Green Pigeon arrived early on Tuesday morning, judging by its behavior which was typical of a newly arrived bird here on Po Toi.
The bad news is, I have not seen any of them yet today. Strangely, there are fewer birds here today than yesterday. The Green Pigeon may still be here, hiding in some large tree (like the Orange-breasted in 2006-07. But I think the Niltava may have gone and possibly the Flycatcher also.
Sent from Po Toi at 12.20