Thanks Bongorob - I see what you mean, didn't realise they were kept at Cotswold as they don't seem to be listed on zootierliste.
I seem to remember you trying to photograph a turaco that was new to you when we went in April, this and the Lady Ross's are the only two turacos I photographed and I seem to remember photographing the one that was new to you, so green would make much more sense
I've just been informed by a keeper of turacos (and former enthusiatic ZooChatter), that the photo is T.p.persa.
"Could you pass on the message that this is a green crested Turaco (Tauraco persa persa) it isn't buffoni as it has a white stripe under the eye where buffoni has green..."