Thanks Guys for the comments.
Re the green cast, please do NOT feel bad mentioning such things, its all part of the process of getting it right for me and it is something I need to pay more attention to. The shot was mid-late afternoon with the bird in shadow but the BG still in sun so I suppose the camera auto WB got a bit confused. After my Robin doing a Wren impersonation thread earlier I have manually tweaked these. The Auto settings looked just too warm/magenta so I tweaked manually. I have my PC set to provide Lightroom colour management settings to sRGB but web browsers are set to a much higher colour temp so appear more blue.
Order of the day for me should be less enthusiasm to post and more attention to workflow detail. When I was at work, the Quality Control department regarded me as a bit of a rogue, it takes time for a Leopard to change its spots eh?