| Clue | Source | Date |
|---|---|---|
| Zoo attraction | New York Times | 29 May 2020 |
| Zoo habitat with trees and rope lines | ||
| Zoo habitat with trees and rope lines | New York Times | 14 Dec 2019 |
| Act like a cantankerous TV doctor? | Wall Street Journal | 29 Dec 2015 |
| Act like a cantankerous TV doctor? | ||
| Zoo home for gibbons |