Apologies if this post comes across as particularly negative.
I visited last week and sadly have to echo many of the comments from the past year about the zoo feeling tired, neglected and old. I have a fondness for London Zoo as I love the history, but walked around with someone not familiar with the collection and that afforded a different albeit less than positive perspective.
One of the recurring themes was "why is this closed?", and it dawned on me how many of the houses and major exhibits are no longer accessible or have simply been forgotten. There are the obvious ones; The Mappin Terraces, which only looked like the outback for about five minutes, The Aquarium and The Casson Pavilion, but there are many others too; inside the buildings and lower viewing on the Cotton Terraces, the pathway around the side of the Blackburn Pavilion and its northern half (although the accessible area inside is much improved since the renovation), the Round House... and of course it doesn't help that the zoo currently ends at the Middle Gardens and there is no access over the canal other than for school groups.
There are the tired and forgotten areas such as the old Stork and Ostrich House, the exhibits adjacent to the park under what is now the high-level gallery of Tiger Territory, the aviaries opposite the Casson that are no longer accessible and large dead areas that appear to have become a
dumping ground for random unwanted items. The less said about crazy golf the better.
With a casual visitor, I also was made aware of how poor some of the exhibits are. The internal monkey enclosures - a throwback to the remaining parts of the Sobell Pavilion - are
horrible to look at and must be really problematic from a husbandry standpoint. Similarly, while there's a great collection of nocturnal animals in the Clore Pavilion (Rainforest Life) the gallery area is long past its best, the route through the building is far from inviting and when we visited, there were mice everywhere.
I'm not sure what the answer is... but perhaps part of the problem (other than the obvious and well documented issues with listed buildings) is the way old buildings and existing areas have been just absorbed into new exhibits rather than starting from scratch. For example, I initially liked the idea of Land of Lions and still think it has a lot of merit, but standing back on a grey day and in an empty zoo, it just looks like a
total mess. The 'New' lion terraces aren't listed, nor were the big cat terraces, but many of their viewing windows, walls, steps and shelters are now part of Land of Lions, which must've been a challenging jigsaw project for the architects to say the least! Compare this to B.U.G.S, which is an excellent exhibit, even though parts of it are currently closed.