Pygmy Slow Loris

Fascinating facts about the Pygmy Slow Loris

• A single pygmy slow loris can weigh up to 700 g in winter, about 50 % heavier than its summer weight, by eating more as days grow shorter, a seasonal fat reserve that helps it survive months of scarce food. This seasonal bulking shows how the loris buffers against harsh winters when insects and fruit disappear.
• Pygmy slow lorises are the only venomous primates: they lick a toxic secretion from elbow glands and mix it with saliva, creating a bite that can trigger anaphylactic shock in humans. This unique chemical weapon deters rivals, and explains why a single bite once sent an adult woman into anaphylactic shock.
• Genetic studies show the pygmy slow loris split from other slow lorises around 2.7 million years ago, making it the earliest-diverging lineage in its genus. This deep split explains why its genome carries unique detox-gene expansions and low-metabolism adaptations not seen in its relatives.
• A 2025 survey in Guangxi, China recorded 98 northern pygmy slow lorises, four-fifths living outside protected areas, revealing a hidden population far larger than the previously estimated 100 individuals for all of China. This suggests the species may persist in fragmented landscapes, but also faces heightened trade risk.
• Females reach sexual maturity at about 9 months, while males need 18-20 months.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia
• Mongabay

At a glance

About the Pygmy Slow Loris

In the lush, vibrant forests of Southeast Asia, the pygmy slow loris moves with a deliberate, almost ethereal slowness, its large, round eyes scanning the shadows for the slightest hint of movement. As it navigates the intricate network of branches and leaves, its soft, furry form seems to blend seamlessly into the dappled light, rendering it all but invisible to the naked eye. With its unique, venomous bite and mesmerizing gaze, this critically endangered creature is a true marvel of evolution, a tiny, nocturnal king of the forest, clinging tenuously to its place in a rapidly changing world.

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