Lumholtz's tree-kangaroo (Dendrolagus lumholtzi) is a heavy-bodied tree-kangaroo found in rain forests of the Atherton Tableland Region of Queensland. Its status is classified as least concern by the IUCN, although local authorities classify it as rare. It is named after the Norwegian explorer Carl Sofus Lumholtz (1851–1922).
It is the smallest of all tree-kangaroos, with males weighing an average of 7.2 kg (16 lbs) and females 5.9 kg (13 lbs). Its head and body length ranges from 480–650 mm, and its tail, 600–740 mm. It has powerful limbs and has short, grizzled grey fur. Its muzzle, toes and tip of tail are black.
Social behaviour 
Lumholtz's tree-kangaroo lives in small, loose-knit groups of three to five, consisting of a male and female mates. Each kangaroo maintains a "home range" and will be hostile towards a member of the same gender that enters it (the one exception seems to be non-hostile encounters between adult males and their male offspring). Thus, the male will protect his own range, and visit the ranges of the females in his group. Mating takes place in episodes of about twenty minutes, and is often quite aggressive.
- Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M, eds. Mammal Species of the World (3rd ed.). Baltimore: Johns Hopkins University Press. p. 60. OCLC 62265494. ISBN 0-801-88221-4.
- Winter, J., Burnett, S. & Martin, R. (2008). Dendrolagus lumholtzi. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 12 Oct 2008. Database entry includes justification for why this species is of Least Concern
- "Lumholtz's tree-kangaroo". Queensland Government. 2005-08-30. Retrieved 2006-10-09.
- "Carl Sofus Lumholtz - biography". Biography. Australian National Herbarium. 17 December, 2009. Retrieved 3 November 2010. "citing: J.W. Cribb, The Queensland Naturalist, Vol.44, Nos.1-3, 2006"
- Flannery, Timothy F, Martin, Roger, Szalay, Alexandria (1996). Tree Kangaroos: A Curious Natural History. Australia: Reed Books. ISBN 0-7301-0492-3. Retrieved 2006-11-25.
- Cronin, Leonard (2000). Australian Mammals: Key Guide (Revised Edition). Annandale, Sydney, Australia: Envirobooks. ISBN 0-85881-172-3.