After the recent rediscovery of Large-billed Reed Warbler Acrocephalus orinus all eyes have been out to see who can be the first to see it in the field (not in the hand). As predicted it has been seen in northern India, not Thailand where it is apparently a vagrant.

Have a look at the photos of the bird: A. orinus

I would imagine that every birdwatcher in South and Southeast Asia is scrutinising every reed warbler they see with unprecedented fervour. Most birders will be eagerly awaiting discovery of the bird’s breeding grounds; I wonder if isotope analysis of the feathers taken from the bird caught in Thailand are being carried out to find out where it came from.