Thanks for your replies. I agree with Citril but unsure as to specific species. Even the latest edition of Stevenson and Fanshaw is not very helpful as my bird looks more like Western Citril being not as heavily streaked underneath as African.
Thanks very much Andrew. Looking through the trip report a Buff- breasted Tody-Tyrant was seen that day. Also a Slender-footed Tyrannulet from which I read the Guianan Tyrannulet has recently been split.
Thanks. That's what I thought originally, but , in the Helm Birds of East Asia ( I do not have a Cambodia guide) Mugimaki is shown with no black on the throat with the reddish chest extending right to the bill. Is this a Cambodia variant?