I was commissioned to do Kangaroo and Tree Kangaroo Field Guide paintings. I posted the Kangaroo guide last week, and happy to say I have now finished the Tree Kangaroos.
It was very difficult to find information or pictures on some of them- some species have been discovered fairly recently, or are threatened by very low numbers and living in remote parts of Australia, Papua New Guinea, and islands. I learned a lot but there is much left to learn. This is as accurate as I could make it from my research, but probably not 100%!