Red slender loris

They cannot jump even short distances. However, they have long limbs that can bridge large gaps between trees

Dr. K.A.I. Nekaris

Red slender loris


They cannot jump even short distances. However, they have long limbs that can bridge large gaps between trees

Population 2000 – 2250
20% further decline over the next 10 years

A captivating and elusive primate that commands attention not only for its striking appearance but also for its unique adaptations that have perfectly suited it for life in the dense forests of southwest Sri Lanka. This small, nocturnal creature is distinguished by its deep red eyes, which are disproportionately large compared to its body size. These eyes, rounded ears, elongated limbs, and legs give the Red Slender Loris an almost otherworldly appearance.

The Red Slender Loris’s large, forward-facing eyes are not merely a distinctive physical trait but critical to its survival. These eyes grant the loris outstanding night vision, allowing it to easily navigate the dark canopy. Furthermore, the positioning and size of its eyes enhance its depth perception, an essential attribute for a creature that spends most of its life in the trees. This exceptional vision enables the Red Slender Loris to accurately judge distances and move between branches with precision, a vital skill for avoiding predators and catching prey.

Adaptations extend beyond its visual capabilities, as the Red Slender Loris is equally adept with its hands and feet. Both are incredibly suited for an arboreal lifestyle, equipped with opposable great toes on both feet, which function similarly to a pincer grasp. This feature, coupled with its slender fingers, allows the loris to maintain a secure grip on branches, facilitating its movement through the trees and its ability to capture insects and other small prey.

Endemic to the southwest of Sri Lanka, the Red Slender Loris faces significant threats from habitat loss and fragmentation, primarily due to deforestation for agriculture and the expansion of human settlements. These pressures not only reduce the loris’s living space but also isolate populations, hindering genetic flow and reducing their resilience to environmental changes and disease.


Population est.
Sri Lanka

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Terrestrial / Aquatic

Altricial / Precocial

Polygamous / Monogamous

Dimorphic (size) / Monomorphic

Active: Diurnal / Nocturnal

Social behavior: Solitary / Pack / Herd

Diet: Carnivore / Herbivore / Omnivore / Piscivorous / Insectivore

Migratory: Yes / No

Domesticated: Yes / No

Dangerous: Yes / No