Thought I’d give some input. No harm in fantasising!
Twycross - With the elephants going they need some more star species. They’re getting tigers soon, supposedly, and I can’t imagine the elephant paddock being used for anything other than rhinos. I think a reptile house is something that Twycross is desperately missing so I’ll say that Nile Crocodiles would be a big hit.
YWP - Yorkshire has become such a hit of a zoo because it’s pretty much entirely made up of crowd-pleasers, and I think that penguins would be the next logical step! Preferably, for me, king penguins.
Hamerton - There is a lot of unused space at Hamerton (or space used for endless amounts of donkeys) so I’d like to see them add another large species. Maybe some sort of bear? I think that Asiatic black bears would fit in quite nicely up near the tigers.
ZSL London - After seeing them and falling in love with them at Leipzig last year, I think that Chinese Pangolins would be a fantastic addition at London, or any zoo for that matter! They fit in well with ZSL’s conservation message.
Bristol - I’d love to see them continue the trend of keeping rare, endangered and unusual species from Australia/New Zealand/ New Guinea. Someone else mentioned bilbies, so I’ll go with the numbat. 5 years ago I wouldn’t have thought it possible, but with bilbies coming over to Europe soon, there may be a chance.
As you can see I have put too much thought into this...
Great list! Would like to see your ideas for other zoos.