Golden-crowned sifaka

It is one of the smallest sifakas (genus Propithecus), weighing around 3.5 kg (7.7 lb) and measuring approximately 90 cm (35 in) from head to tail.

However, it was not formally described until 1988, after a research team led by Elwyn L. Simons observed and captured some specimens for captive breeding.

In Madagascar, lawlessness resulting from the 2009 political coup led to increased poaching of this species, and many were sold to local restaurants as a delicacy.

[3][4] Unsure of its classification, Tattersall provisionally considered it a variant of the silky sifaka in his 1982 book, The Primates of Madagascar,[3][6] citing its mostly off-white to yellowish fur, but also noting its uncharacteristic orange crown patch and tufted ears.

[4] Driven by a report in 1986 that the forest where Tattersall had observed this unique sifaka was contracted to be clear-cut for charcoal production, a research team from the Duke Lemur Center, led by Elwyn L. Simons, obtained permits to capture specimens for a captive breeding program.

[4] Simons and his team were the first to capture and observe the golden-crowned sifaka,[7] formally describing it as a new species in 1988 and naming it in honor of Tattersall.

[7][9] Given the conflicting information, its geographic isolation, as well as the unique long fur tufts on the ears—a trait not shared by any other sifaka—the golden-crowned sifaka was recognized as a distinct species.

[9][11] In 2001, a study involving mitochondrial DNA suggested a very recent divergence between it and the Coquerel's sifaka, then considered a subspecies of the P. verreauxi group.

[9][10][12] In 2004, a comparative study of the karyotypes of the three traditional species of sifakas provided insight into the chromosomal arrangements of all three groups.

Similar to other sifakas, this arboreal animal has long, strong legs that enable it to cling and leap between tree trunks and branches.

[3] The golden-crowned sifaka lives in dry deciduous, gallery, and semi-evergreen forests and is found at altitudes up to 500 m (1,640 ft), though it seems to prefer lower elevations.

[15][14] Surveys have shown it to be limited to highly fragmented forests surrounding the town of Daraina in an area encircled by the Manambato and Loky Rivers in northeastern Madagascar.

[3][16] Out of 75 forest fragments studied by researchers, its presence could be definitively reported in only 44, totaling 44,125 ha (109,040 acres; 170.37 sq mi).

[15] However, a study published in 2010 using line transect data from 2006 and 2008 in five major forest fragments yielded an estimated population of 18,000 individuals.

[14] When stressed, the golden-crowned sifaka emits grunting vocalizations as well as repeated "churrs" that escalate into a high-amplitude "whinney.

"[4] Its ground predator alarm call, which sounds like "shē-fäk",[4][14] closely resembles that of Verreaux's sifaka.

Dietary diversity has been shown to be consistent between populations, suggesting that it is important for the lemur to get a varied mix of nutrients and to protect itself from high levels of specific plant toxins.

[14] Because of their smaller home ranges relative to other sifakas, group encounters are slightly more common, occurring a few times a month.

[4] Aggressive interactions between groups are generally non-physical but include loud growling, territorial marking, chasing, and ritualistic leaping displays.

[3][20] It is thought that such reproductive timing exists to ensure adequate protein intake from the immature leaves for both mother and child at the end of the lactation period.

[6] Observations by researchers and reports from local people indicate that this species will jump to the ground and cross more than 200 m (660 ft) of grassland to reach nearby forest patches.

[15] The only predator known to target this species is the fossa, although the golden-crowned sifaka reacts to the presence of birds of prey with alarm calls.

[8][14] A hematology and serum chemistry study published in 1995 revealed that 59% of the wild golden-crowned sifakas sampled were infected with a microfilarial parasite, a potentially unknown species of nematode in the genus Mansonella.

[15] Malagasy farmers continue to use fire to clear out agricultural land and pasture for livestock, promoting grass growth while inhibiting forest regeneration.

The fires sometimes burn out of control and destroy forest edges along with the natural flora, increasing the damage even further than intended.

[25] Although coal is the preferred cooking fuel of the Malagasy people, the most affordable and prominent source of energy is timber, known as kitay.

[15] A newly emergent threat facing the golden-crowned sifaka is hunting by the gold miners moving into the region's forests.

[3] In 1993, David M. Meyers, a researcher who has studied the golden-crowned sifaka, speculated that if bushmeat hunting were to escalate, the species would go extinct in less than ten years since it is easy to find and not fearful of humans.

[15] Regardless, with its low population, highly restricted range, and badly fragmented habitat, the prospect for survival for the golden-crowned sifaka is considered bleak.

In 2002, none of the forested areas that the golden-crowned sifaka inhabits were part of a formally protected national park or reserve.

The geographic range of the crowned lemur overlaps the range of the golden-crowned sifaka.
The fossa is a predator of the golden-crowned sifaka.
A Malagasy man uses a chainsaw in the middle of several large piles of 1- to 2-meter rosewood logs
Illegal logging poses another threat to the golden-crowned sifaka.