Despite a name that means "thousand feet," almost no millipede actually has a thousand legs. Real leg counts range from as few as around 26 in tiny bristle millipedes to a record-breaking 1,306 in one extraordinary species - with most millipedes falling somewhere between 80 and 400. For centuries the "thousand legs" name was understood as figurative, until a remarkable 2021 discovery finally produced a millipede that lived up to it. This guide explains how many legs millipedes really have, why the numbers vary so much, and how their unusual anatomy works.
The short answer: most millipedes have between 80 and 400 legs, with typical garden species around 100-200. The familiar Giant African millipede has roughly 256. The world record holder, Eumillipes persephone from Western Australia, reaches an astonishing 1,306 legs in adult females - the only millipede ever found with more than a thousand.
Why Millipedes Have So Many Legs
Millipedes belong to the class Diplopoda, meaning "double foot" - and that name is the key to their leg count. Unlike centipedes, which have one pair of legs per body segment, millipedes have diplosegments: fused pairs of segments that each carry two pairs of legs (four legs per diplosegment). This fusion, which happens during development, is why millipedes pack so many legs into their body length.
To estimate a total, you multiply the number of diplosegments by four, then account for the ends of the body. The head segment (the collum) bears no legs at all, the first few trunk segments carry only a single pair each, and the final segment (the telson) is also legless. That's why simply counting segments and multiplying by four overestimates the real number - and why scientists usually give ranges rather than exact figures for most species. For Eumillipes persephone, around 330 segments translate into roughly 1,306 legs once those legless and transitional segments are taken into account.
The Record Holders
Eumillipes persephone holds the undisputed record for the most legs of any animal. It was discovered in 2021 down drill holes used for mineral exploration in Western Australia's Eastern Goldfields, living up to 60 metres below the surface. Adult females have between 998 and 1,306 legs across as many as 330 body segments; males have noticeably fewer, around 818. Pale, eyeless and thread-thin, it's perfectly adapted to navigating tiny crevices deep underground, and its discovery (published in Scientific Reports) finally validated the "millipede" name.
Before that, the record belonged to Illacme plenipes from California, whose females reach up to 750 legs. Remarkably, these two champion leg-bearers aren't close relatives - they evolved their extreme elongation independently, a striking case of convergent evolution driven by similar underground lifestyles.
How Many Legs Do Common Millipedes Have?
For the millipedes most people actually encounter, the numbers are far more modest:
- Giant African millipede (Archispirostreptus gigas): the classic large pet species, reaching over 30cm with around 256 legs - impressive, but far below the subterranean record-holders.
- Typical garden millipedes: generally 80-200 legs. These are the snake-like species you find in leaf litter and soil, quietly recycling organic matter, much like woodlice with their 14 legs.
- Pill millipede (Glomeris marginata): which rolls into a tight ball when threatened, has only 17-19 pairs of legs.
- Bristle millipedes (Polyxenus lagurus): tiny species that mature with just 13 pairs (26 legs) - proof that not all millipedes accumulate huge counts.
As a rule, surface-dwelling species in temperate forests rarely exceed 300 legs, however many segments they grow - they simply don't need extreme elongation to move through open leaf litter. It's the subterranean species, squeezing through tiny underground passages, where evolution has favoured ever-longer bodies and ever-more legs.
Millipedes Grow Their Legs Over Time
Here's a detail that surprises many people: unlike insects, which hatch with their final leg count already set, millipedes add legs as they grow. This process, called anamorphosis, happens through successive moults - each time a millipede sheds its exoskeleton, it gains new body segments at the rear, and new legs develop on them.
So a hatchling looks very different from an adult. Eumillipes persephone hatches with just four pairs of legs; Polyxenus lagurus starts with three. With each moult, more segments and legs are added, and because growth depends on age, nutrition and moulting success, even two individuals of the same species and age can end up with different leg counts. Some species stop adding segments once mature, while others keep going. This is exactly why "how many legs does a millipede have?" has no single tidy answer - it depends on species, age and individual development. A young Giant African millipede might briefly have fewer legs than an adult bristle millipede, despite belonging to a species that will eventually have ten times as many.
Clearing Up Some Confusion
The "thousand legs" myth
The name comes from the Latin mille (thousand) and pes (foot), but until 2021 no known species had ever reached 1,000 legs - the previous maximum was 750. Eumillipes persephone finally vindicated the name, but it's an extreme outlier: the vast majority of the roughly 12,000 described millipede species (with many thousands more thought to exist) will never come close to four figures. The name really reflects the impression these animals make - many legs rippling in coordinated waves - rather than an accurate count.
Millipede or centipede?
The simplest distinction is the legs: millipedes have two pairs per segment, emerging from beneath the body, while centipedes have one pair per segment, projecting out to the sides. Centipedes are fast predators with venomous mouthparts; millipedes are slow detritivores that eat leaf litter, fungi and decaying matter, with no venom. Instead, many millipedes defend themselves with chemical secretions (some produce hydrogen cyanide), and some roll into a protective ball.
Why counts are given as ranges
Counting millipede legs is genuinely tricky: legs may be damaged or missing, specimens won't hold still, the smallest species need a microscope, and males have modified legs (gonopods) that complicate what counts as a "leg." Add in natural variation between individuals, and exact single figures simply aren't realistic for most species - which is why scientists report ranges.
Frequently Asked Questions
How many legs does a millipede have?
Most have between 80 and 400 legs, with typical garden species around 100-200. They range from about 26 in tiny bristle millipedes to a record 1,306 in one extreme species. Almost none actually have 1,000.
Does any millipede really have 1,000 legs?
Just one known species: Eumillipes persephone, discovered in Australia in 2021, whose females can have up to 1,306 legs. It's the only millipede ever found with more than a thousand - before it, the record was 750.
How many legs does a Giant African millipede have?
Around 256, give or take - a lot, but far fewer than the deep-burrowing record holders. They're the large species most people picture and keep as pets.
Do millipedes have two legs per segment?
Effectively yes. Each visible "segment" is actually a diplosegment - two fused segments bearing two pairs of legs (four legs total). The head and tail segments have none.
Do millipedes gain legs as they grow?
Yes - through a process called anamorphosis, they add body segments and legs with each moult. Hatchlings have only a few pairs and build up their full count over time, so juveniles have far fewer legs than adults.
What's the difference between a millipede and a centipede?
Millipedes have two pairs of legs per segment (under the body) and are slow plant-eating detritivores; centipedes have one pair per segment (out to the sides) and are fast, venomous predators.
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