Slow Loris

Fascinating facts about the Slow Loris

• A slow loris produces venom from a gland under its arm — the only venomous primate on Earth. It mixes this toxin with saliva to coat its teeth before biting, a defence strategy shared with some snakes but almost no mammals. This 200-million-year-old trick suggests venom evolved in the ancestor of all primates, then was lost in nearly every lineage except this one.
• Their eyes are so large they weigh more than their brain. A slow loris's brain is roughly the size of a pea, yet each eye is nearly as big, giving them night vision 40 times sharper than humans — essential for hunting insects in pitch-black rainforest canopies where they live 15 metres above the ground.
• Slow lorises move at 0.15 metres per second, so deliberately slow that insects can't detect the vibrations their weight creates on branches. This stealth hunting pays off: they can snatch a fly mid-flight without the branch even trembling. Speed is a liability in their world; stillness is the superpower.
• A mother slow loris parks her baby on a branch at night and leaves it there — completely alone — for up to 8 hours while she hunts. The infant doesn't cry, cling, or move. It simply waits in silence, camouflaged by its pale fur, a survival strategy born from the danger that moving would attract predators in the dark.
• The illegal pet trade has decimated wild populations in some regions despite their 'Least Concern' status on paper. Traders often rip out their teeth to make them 'safe' as pets, leaving them unable to eat insects and fruit. Rescue centres across Southeast Asia care for hundreds of mutilated lorises, their natural lives over before they reached maturity.

At a glance

About the Slow Loris

In the misty, moonlit forests of Southeast Asia, the slow loris emerges as a creature of enchanting gentleness, its large, round eyes shining like lanterns in the darkness as it navigates the treetops with a deliberate, almost meditative slowness. With a soft, furry coat and a tiny, button nose, this diminutive primate moves through the world with a quiet, unassuming air, its slow, deliberate movements a testament to its unique, laid-back character. As it reaches out a slender hand to pluck a juicy insect from the air, the slow loris embodies a tranquil, unhurried existence, a true marvel of evolutionary adaptation.

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