There is not much known about the mating systems of Dendrolagus lumholtzi, is known to be polygynous. A male investigates a receptive female by standing in front of her, making soft clucking sounds, and pawing gently at her head and shoulders. When the female moves away, the male follows and paws at the base of her tail. Also in the other tree kangaroo species of Australia, Dendrolagus bennettianus, males are very territorial with other males but their territory often overlaps with several females, leading to the idea that they are polygynous. Captive specimens have shown that in the presence of a female, two males fight competitively, but without the female they live in peace. (Strahan, 1995)but their relative in Australia,
It is believed that the breeding of D. bennettianus breed annually and the pouch life is around 9 months. The young is known to live with the mother up to 2 years. ("Tree Kangaroos", 1990; Flannery, 1995b)is non-seasonal. Also, the females give birth soon after a young leaves the pouch, and before the older young becomes independent. The number of offspring is usually one, but on extremely rare cases, twins occur. Sexual maturity is reached at 8.5 to 10.6 kg in weight for females and 12 kg for males. Males continue to grow throughout their lifetime, growing to weights of 17 kg. The females of
Not much is known about the parental investment of. Like all kangaroos, females protect and nurse their young while they develop in the pouch. Female will protect their offsrping for up to two years.
The lifespan of ("Tree Kangaroos", 1990)is up to 10 years.
Grizzled tree kangaroos are very agile in trees and travel from tree to tree by leaping. They are believed to belong to a primitive group of tree-kangaroos because their hind limb morphology that is less adapted for arboreal behavior than in realted species. When leaping from tree to tree, they always flee downward, so are easily and often captured by hunters who grab their tail as they flee. They prefer sleeping on strong, horizontal branches and spend most of their lives in trees, but they do frequently come to the ground. On the ground, D. lumholtzi and D. bennettianus are both solitary species. ("Tree Kangaroos", 1990; Flannery, 1995b; Strahan, 1995; Walker, 1964)is able to hop on its long hind legs, although not very gracefully. The tail is held off the ground and the body moves forward to counterbalance it. It is not known if it is a solitary or social species, but
There is not much information of the home range of
There is not much known about howcommunicates with others or perceives the environment. Presumably, it relies on visual and tactile cues to aid its arboreal lifestyle.
The predators of ("Tree Kangaroos", 1990)are unknown.
There is little information of howplay a roles in the ecosystem. As herbivores, they may limit plant populations.
There is little information pertaining negative effects on humans.
Grizzled tree kangaroos are commonly kept as pets. They are also hunted intensively, often killed before reaching maximum size. They are also over exploited due to growing human population. (Flannery, 1995b)
Matthew Wund (editor), University of Michigan-Ann Arbor.
Yan-Iuan Ho (author), University of Michigan-Ann Arbor, Phil Myers (editor, instructor), Museum of Zoology, University of Michigan-Ann Arbor.
Living in Australia, New Zealand, Tasmania, New Guinea and associated islands.
uses sound to communicate
young are born in a relatively underdeveloped state; they are unable to feed or care for themselves or locomote independently for a period of time after birth/hatching. In birds, naked and helpless after hatching.
Referring to an animal that lives in trees; tree-climbing.
having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
uses smells or other chemicals to communicate
At about the time a female gives birth (e.g. in most kangaroo species), she also becomes receptive and mates. Embryos produced at this mating develop only as far as a hollow ball of cells (the blastocyst) and then become quiescent, entering a state of suspended animation or embryonic diapause. The hormonal signal (prolactin) which blocks further development of the blastocyst is produced in response to the sucking stimulus from the young in the pouch. When sucking decreases as the young begins to eat other food and to leave the pouch, or if the young is lost from the pouch, the quiescent blastocyst resumes development, the embryo is born, and the cycle begins again. (Macdonald 1984)
animals that use metabolically generated heat to regulate body temperature independently of ambient temperature. Endothermy is a synapomorphy of the Mammalia, although it may have arisen in a (now extinct) synapsid ancestor; the fossil record does not distinguish these possibilities. Convergent in birds.
A substance that provides both nutrients and energy to a living thing.
animals that live only on an island or set of islands.
offspring are produced in more than one group (litters, clutches, etc.) and across multiple seasons (or other periods hospitable to reproduction). Iteroparous animals must, by definition, survive over multiple seasons (or periodic condition changes).
having the capacity to move from one place to another.
the business of buying and selling animals for people to keep in their homes as pets.
rainforests, both temperate and tropical, are dominated by trees often forming a closed canopy with little light reaching the ground. Epiphytes and climbing plants are also abundant. Precipitation is typically not limiting, but may be somewhat seasonal.
specialized for leaping or bounding locomotion; jumps or hops.
reproduction that includes combining the genetic contribution of two individuals, a male and a female
uses touch to communicate
the region of the earth that surrounds the equator, from 23.5 degrees north to 23.5 degrees south.
uses sight to communicate
reproduction in which fertilization and development take place within the female body and the developing embryo derives nourishment from the female.
breeding takes place throughout the year
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1990. Tree Kangaroos. Pp. 390-392 in S Parker, ed. Grzimek's Encyclopedia of Mammals, Vol. Volume 1, 1 Edition. New York: McGraw-Hill Publishing Company.
Flannery, T. 1995. Mammals of New Guinea. Australia: Reed Books.
Flannery, T. 1995. Mammals of the South-West Pacific and Moluccan Islands. Australia: Reed Books.
Ganslosser, U. 1977. Observationss on behavior of doria tree kangaroos and grizzled grey tree kangaroos in zoological gardens. Zoologischer Anzeiger, 198 (5-6): 393-412.
Nowak, R. 1997. "Walker's Mammals of the World 5.1" (On-line). Accessed March 30, 2004 at http://www.press.jhu.edu/books/walkers_mammals_of_the_world/marsupialia/marsupialia.macropodidae.dendrolagus.html.
Schoon, H., M. Rosenbrunch, G. Ruempler. 1985. Systemic arteria calcinosis in a grey tree kangaroo Journal of Comparative Pathology, 95 (3): 319-324., resembling Monckeberg type arteriosclerosis in man.
Strahan, R. 1995. The Mammals of Australia. Australia: Reed Books.
Walker, E. 1964. Mammals of the World Volume 1. Baltimore: The Johns Hopkins Press.