Sanje mangabey

They are also known as ‘white-eyelid’ mangabeys for their distinctive white eyelids, which they flash in threat displays

Marc Veraart


Sanje mangabey

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They are also known as ‘white-eyelid’ mangabeys for their distinctive white eyelids, which they flash in threat displays

Population 1,300 – 3500

A species both striking in appearance and intriguing in behavior that occupies a precarious position within the ecosystems of Tanzania’s Udzungwa Mountains. Characterized by its distinctive facial features, including a grey snout complemented by pinkish or grey skin, this primate captures the attention of those fortunate enough to observe it in the wild. The variation in fur coloration, ranging from smoky brown or fawn to silvery grey with pale orange undertones on the abdomen, further enhances its visual appeal and provides a measure of camouflage within its forest habitat.

Dietarily, the Sanje Mangabey exhibits a preference for a fruit-based diet, with fruits constituting approximately 70% of its nutritional intake. The specific fruits consumed are largely dependent on seasonal availability, illustrating the mangabey’s adaptability to its environment and its role as a seed disperser within the ecosystem. Beyond fruits, their diet is supplemented by fungi, flowers, leaves, insects, and on rare occasions, snails or lizards, showcasing a degree of dietary flexibility that enables them to thrive across various environmental conditions.

Despite their arboreal tendencies, Sanje Mangabeys spend a considerable amount of time foraging on the forest floor. This behavior, while essential for accessing a diverse range of food sources, renders them particularly vulnerable to threats such as hunting and poaching. The pursuit of these primates for bushmeat poses a significant risk to their survival, exacerbated by habitat destruction resulting from charcoal production and timber extraction. Such activities have not only led to a drastic reduction in their population but have also fragmented their habitat, isolating groups and limiting their access to food and mates.

Distribution

Country
Population est.
Status
Year
Comments
Tanzania
1,300 – 3500
EN
2016

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Terrestrial / Aquatic

Altricial / Precocial

Polygamous / Monogamous

Dimorphic (size)/ Monomorphic

Active: Diurnal / Nocturnal

Social behavior: Solitary / Pack / Herd / Troop

Diet: Carnivore / Herbivore / Omnivore / Piscivorous / Insectivore

Migratory: Yes / No

Domesticated: Yes / No

Dangerous: Yes / No