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The Collaborative International Dictionary
ruffed lemur

Ruffed \Ruffed\, a. Furnished with a ruff.

Ruffed grouse (Zo["o]l.), a North American grouse ( Bonasa umbellus) common in the wooded districts of the Northern United States. The male has a ruff of brown or black feathers on each side of the neck, and is noted for the loud drumming sound he makes during the breeding season. Called also tippet grouse, partridge, birch partridge, pheasant, drummer, and white-flesher.

ruffed lemur (Zo["o]l.), a species of lemur ( lemur varius) having a conspicuous ruff on the sides of the head. Its color is varied with black and white. Called also ruffed maucaco.

Wiktionary
ruffed lemur

n. Any of several nocturnal lemurs of the (taxlink Varecia genus noshow=1), from Madagascar; with white ruffs around the face.

Wikipedia
Ruffed lemur

The ruffed lemurs of the genusVarecia are strepsirrhine primates and the largest extant lemurs within the family Lemuridae. Like all living lemurs, they are found only on the island of Madagascar. Formerly considered to be a monotypic genus, two species are now recognized: the black-and-white ruffed lemur, with its three subspecies, and the red ruffed lemur.

Ruffed lemurs are diurnal and arboreal quadrupeds, often observed leaping through the upper canopy of the seasonal tropical rainforests in eastern Madagascar. They are also the most frugivorous of the Malagasy lemurs, and they are very sensitive to habitat disturbance. Ruffed lemurs live in multi-male/multi-female groups and have a complex and flexible social structure, described as fission-fusion. They are highly vocal, and have loud, raucous calls.

Ruffed lemurs are seasonal breeders and highly unusual in their reproductive strategy. They are considered an "evolutionary enigma" in that they are the largest of the extant species in Lemuridae, yet exhibit reproductive traits more common in small, nocturnal lemurs, such as short gestation periods (~102 days) and relatively large average litter sizes (~2–3). Ruffed lemurs also build nests for their newborns (the only primates that do so), carry them by mouth, and exhibit an absentee parental system by stashing them while they forage. Infants are altricial, although they develop relatively quickly, traveling independently in the wild after 70 days and attaining full adult size by six months.

Threatened by habitat loss and hunting, ruffed lemurs are facing extinction in the wild. However, they reproduce readily in captivity, and have been gradually re-introduced into the wild since 1997. Organizations that are involved in ruffed lemur conservation include the Durrell Wildlife Conservation Trust, the Lemur Conservation Foundation (LCF), the Madagascar Fauna Group (MFG), Monkeyland Primate Sanctuary in South Africa, Wildlife Trust, and the Duke Lemur Center (DLC).