Interesting read! European Bison described in the guide, just 12 years later will become extinct in the wild.
They care of well-being of individual animals, like elephants or orangutans. They advocate protecting Indian rhinos from hunting, which were then extremely endangered. However the rarity of animals is usually mentioned only in the context that a given species is difficult to purchase. There is no much interest in breeding wild animals, and the idea that zoos could save animals through captive breeding is still unknown. Wolves are still described as a vermin threatening more valuable hoofed animals.
Great apes are described with affection. However they apparently usually died soon and were continuously replaced by new ones, judging from the text that the zoo rarely has not a chimp nor an orangutan on display. Howler monkeys are considered impossible to keep. A gorilla has never reached Bronx. However the great heron aviary is completely modern, and remains the biggest aviary in Bronx Zoo in 2020.
