It very possibly could be a matter of cost, but I still disagree with the use of these old structures in new exhibits. Sure they will work at the moment, but considering that they all already date back to many decades ago and are already outdated, how will they look another 50 years for now? If the zoo keeps these in upcoming exhibits they will only become worse and even more outdated overtime. That is a common theme with some of the zoos recent exhibits, they are perfectly good -sometimes great - but have elements they make the areas feel like a refresh of something old rather than something brand new.
While we are on the topic of old school zoo design - not news, just a couple of neat details - I recently received a zoo guidebook dating back to 1973. It was a lovely little read and I was shocked to see how the zoo was arranged back then. For anyone interested, here are some of the highlights.
Africa, Asia South America Groupings:
North America:
- Africa still has elements from then still standing today. White rhinos were originally present were the red river hogs are now, between the old elephant and hippo yards. Secretary birds, springbok and hartebeest were present in the African hoofstock yards.
- The Asian section was much different. Asian elephants in the current large black rhino yard, with Indian rhinos in the current smaller black rhino yard. The existing camel yard contained axis deer, blackbuck, demoiselle crane and sarus cranes.
- South America sounded like it was absolutely packed with species at the time. The following are all listed. Tapirs, llamas, capybara, giant anteater, pacas, caves, agouti, flamingos, rheas, humboldt's penguins, king vultures, red-footed tortoises and a small section with clipped macaws on a display of sticks. So many species all in the same exhibit, absolutely incredible!
- The modern day caribou and elk paddocks are grassy and well planted, but they were once essentially just large patches of dirt and bison were in the existing caribou paddock.
- Stellers sea lions were in the now harbor seal exhibit and visitors could purchase fish to throw to the animals from a distance.
- Wolverines were at some point present in this area.
Primates:
Reptile and Aquatic Center:
- The old primate building was about half the size the current pair of primate complexes, but the collection will make any primate enthusiast start drooling. Species of interest include, lar gibbons, proboscis monkeys, barbary apes, lion-tailed macaque, black macaque, patas monkey, crested mangabey, scatter's guenon, syke's guenon, geladas and red uakaris. All of these alongside the present day assortment of gorillas, orangutans, colobus monkeys, mandrills, siamangs and spider monkeys.
- The monkey island now home to about a dozen Japanese macaques, was originally home to roughly 125 rhesus monkeys.
Small Mammal House:
- During this time - and they could be fit into this building is beyond me - there were at least two amazon river dolphins in a 51,000 gallon tank.
Deer Park:
- The exhibit that currently holds a two-toed sloth and an agouti, formerly river otters, once held harbor seals. Horrifically small but a fantastic blast from the bast for zoo history buffs. Other former residents of the day room included caracles, squirrel monkeys, black-backed jackels, bat-eared foxes, fishers, jaguarundis and even a grison.
- The collection in the nocturnal room is even more impressive with palm civets, bearcats, hog badgers, pale fox, giant pangolins, ferret badgers and bush-tailed galagos. Its astonishing how such an immense collection was able to fit into such small exhibits.
The zoos collection at this time seems to be unmatched to just about any other American zoo out there. Of course, the exhibits at this time were even less appealing than the ones we have today and many of the rarer species had to be phased out. Alas it was a real surprise to see some animals on the list, and perhaps some will will return some day.
- This was an exhibit that existed on the site of the current west entrance and otter exhibit. It was essentially a large walkthrough exhibit where guests could buy food for over 100 fallow deer. I am unsure when this area closed down, but it looks like quite a spectacle.
A few of these changes happened not that long ago. I can recall from the early 2000s many of the species listed for the South America paddock, including the wing-clipped macaws. Wolverine was also present until the 2000s. As stated by @savetherhino they were near the brown bears. The exhibit was a smaller grotto similar to the badger exhibit in the other chunk of "North America".
Regarding the river dolphins, I never visited the zoo while they had them but my understanding is that they were in a tank on the back wall exactly opposite of where the front doors are. Later on in the 80s, like quite a few other zoos, amusement parks, and other attractions, they had performing bottlenose dolphins in their sea lion show stadium.
The collection sounds like it was quite a lot bigger back in the 70s, but I suppose that's the trend with most zoos.