They were moved semi- on show when the zoo opened again after closing for the winter of 2014/15 (ie. a little over a year ago) though not visible right on the path, but a few metres away with a sign pointing towards them. Though not a brilliant up-close view, I did see them in this more distant view when I visited last summer.
I guess they are still in this place? (viewable off the pathway leading to the 'behind the scenes' aviaries, on the side of the flight show lawn with the parrots?)