Very red-tailed brown.....hard bird

Indeed very red-tailed and also very pale on the back. Are you sure it is a Brown Shrike?
I suspect that it is an Isabelline Shrike. I believe Buir Nuur is quite close to the easternmost breeding sites of Isabelline Shrike.

Yes guys, you are right. I checked some more pictures of this bird, and it is indeed a juvenile Isabelline Shrike.

Thanks for providing clarification.
Steve