Took this snap today 10 July 2022
location Mt Abu Raj India.
It's a very early Sykes's Warbler.
Note combination of very uniform, sandy upperparts i.e
showing no contrast in tertials/wings/tail, with whitish underparts, narrow pale supercilium terminating at rear of eye, otherwise, a very plain head/face, long, slim bill with all pale lower mandible, white outer margin to tail (R6) and greyish legs. Structurally, in addition to long, slim bill, it has a rather flat-headed appearance, very short pp., long tail (1st image), long P1 and emarginated P3,4,5,6. Further, the 1st image shows a typical Sykes's posture with the body in the horizontal position with raised head and bill.
The bird appears quite heavily worn so presumably an adult.