You’re sitting staring out over the mudflats of the west coast of Peninsular Malaysia. A single flock of waders flies past in the heat haze (I’ll spare you the actual heat!), and you take 5 frames of the flock as it flies past (Frame 1 is the right hand end, Frame 5, the leftmost. Frames 1 and 2 overlap slightly).
Now your job is simple – identify all the species in the flock!