Beetle

sorry for posting at a wrong place and please help me to move the topic to identification forum if needed.

Po Toi 16 March 2008
It was hiding inside dense bushes so i didn't manage to get a better photo.





size: small, similar to yellow-browed
appearance: relatively pale, greyish upperside, narrow black eyestripe(as in photo)
voice: different from a dusky - more similar to that of a common stonechat, and not so rhythmic

seems the bird is also ringed (although not helping in identification).

Beetle

i didn't really see rings through my binoculars, maybe the "rings" in the photo are just other things else in front of the bird.



Yes the voice was just like what you described, and exactly the bird was seen just above the school.