Having been told that, despite what I thought, there was still an Oriental white stork at the zoo, I searched it out today. This is the result of leaning over a 'no entry' gate and trying to focus through wire fences in the area behind the ABC building. It would appear that there are in fact two storks, something I have confirmed by checking the 2019 Inventory - unless somebody knows different. There was what looked like a hornbill behind them - impossible for me to snap.