TBH: All tree kangaroo species require a higher quality of animal care and husbandry in order to successfully maintain the species in captivity.
I believe around 2/3rds of that region got put up for sale back in the 80s and the rest put into a NP, However there is a Foundation online that takes donates to buy back large blocks of it many of the blocks have outstanding trees and wildlife on it!Exactly because they are a native and endangered species it would be crucial that the local zoo community invest in husbandry, management and vet care in order to come on top of the "pre-existing" health conditions and assist with setting up in situ programs to address the habitat, nutritional and health requirements of tree kangaroos in northern Australia (this also pertains to the other native Bennett's tree kangaroos).
Why does it have anything to do with a national park??
He is discussing the state of tree kangaroo conservation in Australia. Essentially what he is saying is that around 2/3 of tree kangaroo habitat has been bought by developers and is going to be subdivided and used for housing while the other 1/3 has become national park for the tree kanagroos and other wildlife. He also mentions that there is a charity that buys back the land from developers and converts it back to rainforest, essentially providing tree kangaroos and many other rainforest species pockets of habitat and wildlife corridors amongst the new housing developments in Far North QueenslandWhy does it have anything to do with a national park??