'Tree lobsters' – the rarest insects on Earth – are on exhibit at a US zoo

The coconut crab is more like a tree lobster than these stick insects:

https://allthatsinteresting.com/coconut-crab

https://en.wikipedia.org/wiki/Coconut_crab

Coconut crabs can climb trees and hunt birds.

The insects were once thought to be extinct before they were rediscovered on the Ball’s Pyramid volcano in 2001.