This may be the Maylandsea bird but can't swear to it, all the BB links are dead.
Yes, that’s the one (24th May 1999)
Brian Small observed the bird and co-wrote the description I think, so he’s our resident expert and apologies to him if I’ve misrepresented anything but from what I read ...
Finder cites 2 possible confusion races before ruling them out -
M.f.thunbergi and
M.f.cinereocapilla (I think that’s one of the Eastern races)
noted
1. jet-black cap - glossy/matt depending on light
2.
several flecks of yellow on the lores and yellow-toned supra-loral stripe bridging the forehead
3 thin post-ocular stripe -grey/white above ear coverts which were mottled sooty grey at close range (you can see this in Andy’s image
4 nape sooty-black - admixed with patchy olive and grey feathering extending onto upper mantle forming clearly defined shawl.
5 upperparts olive green, quite bright - at times almost yellow - darker feather centres at close range.
6 rump and lower back brighter, yellowish
7 underparts ‘buttercup yellow’ paler throat sides fading to white close to the base of the upper mandible
Further obs also noted but the ones in bold were the ‘deal breaker’ and following Alstrom & Mild’s contemporaneous treatment of
feldegg that individuals showing white supercilia were likely intergrades, BBRC decided on principle not to accept any birds with supercilia stripes at all as pure
feldegg.
Rather:
“
Observers of a potential pure feldegg should establish clearly the colour and extent of gloss on the crown and nape, and whether the bird shows any potential intergrade features. These would include the presence of any yellow, grey or white superciliary stripes and/or the presence of any extensive white in the throat. A restricted amount of white in the malar region would not necessarily be incompatible with true feldegg,
I don’t know whether the link will work here
https://britishbirds.co.uk/sites/default/files/V96_N06_P291_296_A002.pdf
