The brown‑mantled tamarin (Saguinus fuscicollis) is a species of New World monkey in the family Callitrichidae. It inhabits the tropical rainforests of the western Amazon basin, primarily within north‑western Brazil, eastern Peru, and adjoining areas of Bolivia.
Taxonomy
- Kingdom: Animalia
- Phylum: Chordata
- Class: Mammalia
- Order: Primates
- Family: Callitrichidae
- Genus: Saguinus
- Species: S. fuscicollis
Physical description
The brown‑mantled tamarin is a small primate, with adult body length ranging from 20 to 25 cm (head‑body) and a tail approximately 30 cm long. Weight typically falls between 300 and 450 g. Its distinctive coloration includes a dark brown or grayish mantle covering the back and shoulders, lighter gray or reddish‑brown underparts, and a facial mask of darker fur surrounding the eyes and muzzle. The tail is non‑prehensile and generally longer than the body.
Distribution and habitat
The species occupies lowland evergreen and semi‑evergreen forests, often near watercourses and flood‑plain edges. Its range is fragmented by rivers that serve as natural barriers, contributing to the existence of several recognized subspecies, such as S. f. fuscicollis and S. f. graellsi.
Behavior and ecology
Brown‑mantled tamarins live in social groups typically comprising 3–12 individuals, consisting of a breeding pair, offspring, and sometimes auxiliary males or females. They exhibit cooperative breeding, with non‑reproductive members assisting in infant care. Daily activity patterns are diurnal, and the tamarins travel through the forest canopy and understory, often forming mixed‑species associations with other callitrichids, such as marmosets.
Diet
Their omnivorous diet includes fruits, gums, nectar, insects, and small vertebrates. Seasonal availability of fruit influences foraging behavior, and they have been observed employing gouging techniques to access tree exudates.
Reproduction
Gestation lasts about 140 days, after which a single infant is usually born. Twins occur but are less common. Weaning is completed within 3–4 months, and juveniles attain sexual maturity at roughly 12–18 months.
Conservation status
The International Union for Conservation of Nature (IUCN) classifies the brown‑mantled tamarin as Least Concern due to its relatively wide distribution and presumed large population. However, ongoing threats include habitat degradation from logging, agriculture, and infrastructure development, as well as potential capture for the pet trade. Conservation measures focus on habitat protection within existing reserves and sustainable land‑use planning.
References
- IUCN Red List of Threatened Species (latest assessment).
- Groves, C. (2005). Mammal Species of the World. 3rd edition. Johns Hopkins University Press.
- Defler, T. R. (2004). Primates of South America: Comparative Perspectives in the Study of Behavior, Ecology, and Conservation. Springer.
