I was birding last week in the extreme north of Peninsular Malaysia. I was alerted by an unfamiliar call - high-pitched and buzzy - reminiscent of but not as high-pitched as Red-throated Pipit. However, the only bird I could see was this pipit, which at the time I thought was Paddyfield (Paddyfield Pipit is the default pipit anywhere in Malaysia). I did not hear the call again.
After I had taken these and a few other similar pics, the bird flew, and the only bird I was subsequently able to locate called exactly as I would expect a Paddyfield to. I was unable to get a view of the mantle.
My guess is that this bird is a Paddyfield Pipit in fresh plumage, but the crown seems very well-streaked and the median coverts are suggestive of Blyth's - a species I have no experience of (and which has never been recorded in Malaysia). My guess is that the bill and hind claw shape are closer to Paddyfield.
Does anyone with experience of both species have any thoughts?