Years ago London had a lone male Tree Kangaroo, a Goodfellow's I think, he used to perch on the edge of the glass screen in an enclosure that had a water barrier looking at everyone walking past, he must have lived to a right old age. ..........
Yes, the long-lived tree kangaroo that used to perch on the edge of the glass screen was a Goodfellow's tree kangaroo; however, it was a female, not a male.