On a recent trip to Myanmar (Jan 2010) Nigel Clark, Rob Robinson and I saw this adult shrike spp at Moulmein (northern Tenasserim), photo by Rob. Structurally similar to a Brown Shrike, though perhaps slightly shorter tailed, but the striking feature is the grey head with thin white supercilium. It is possibly an adult Brown Shrike of lucionensis race but that would seem a long way out of range. Of several hundred brown shrikes seen, none had this grey headed appearance.
Can anyone with more experience comment?