Ichneumon

Also Known As: Echinemon, Neomon, Suillus, Pharaoh’s Rat; Greek ikhneumon, “the tracker”
Region/Culture: North Africa
Mythos: Egyptian Mythology, Medieval Mythology, Christian Mythology
Primary Type/Nature: Monsters and Beasts
Mythical Attributes: It armours itself in layers of sun-baked Nile mud, then kills asps, crocodiles and dragons far larger than itself, often by getting inside them.
Role in Mythos: It is the sacred snake-killer of Egypt and, in the medieval bestiaries, the small clean thing that destroys a great evil from within.
Relation to Humans: Egyptians revered it, embalmed it, and buried it in sacred tombs in its own cities, and cast bronze statuettes of the goddess Wadjet to hold its mummified body. To people it is harmless, and it was kept and honoured precisely because it killed the things that were not.

The mud goes on in layers. The animal walks down into the shallows, rolls until it is heavy and black with river silt, then climbs out and lies in the Egyptian sun until the coating dries pale and tight and cracks a little at the joints. Then it goes back and does it again. By the third or fourth coat it is not really an animal any more. It is a small, low, armoured thing with a long tail and an elongated head, and it walks toward the asp without hurrying.

Pliny gives the fight three moves. The ichneumon turns its back and raises its tail, and the serpent strikes at the tail, and the strikes land in baked clay and do nothing. It keeps turning, keeps absorbing, waits. Then the head goes sideways, the eye finds the throat, and that is the end of the asp. Isidore, writing six centuries later, kept the feint and dropped the armour: the raised tail is bait, the snake commits everything to it, and while the snake is busy being deceived it is seized.

The thing underneath all this is real, and it is not a monster. Herpestes ichneumon, the Egyptian mongoose, the pharaoh’s rat, still hunts the Nile marshes. It is built like a ferret drawn out longer and lower, coarse-coated, able to cover a startling distance in one flat spring. Isidore even derived one of its old Latin names, suillus, from saeta, bristle, because its hair stands up on it like a boar’s. Its Greek name means tracker, the one that follows a scent. Everything the legend adds is layered onto an animal that any Egyptian farmer could have watched crossing a canal bank in the morning.

What the legend adds is the crocodile. Strabo, travelling in Egypt around the turn of the first century, reported that the people of Heracleopolis honoured the ichneumon while their neighbours at Arsinoe honoured the crocodile, which made the two towns theologically incompatible in a way that must have been awkward at festivals. The Heracleopolitans had their reasons. Their animal destroyed asps’ eggs and asps alike, dragged the snakes into the river by head or tail and drowned them, and then went looking for something bigger. It would wait while a crocodile hauled out to bask, jaws propped open in the heat. When the great mouth was open and still, the ichneumon threw itself down the throat, ate through the entrails and the belly, and came out through the wall of the corpse. Pliny has the same scene and adds the detail that the ichneumon waits for the crocodile to be lulled asleep by the little birds cleaning its teeth. A javelin, he calls it, going in.

The real animal does none of this.

That never mattered. The story was too good and too useful, and it travelled. The medieval bestiaries inherited the ichneumon from Pliny and Isidore and promoted its enemy: the asp became a serpent, the serpent became a dragon. Now the beast muds itself, plugs its own nostrils with its tail against the poison, and goes in. Thomas of Cantimpré copied Isidore’s tail-feint into his encyclopedia of nature almost word for word, changing nothing but the spelling of the name. Along the Nile the ichneumon also acquired a double, the hydrus, a water creature that performs the swallowing trick and gets the sermon that goes with it: the small thing that lets itself be eaten, passes through the belly of the great devourer, and comes out the other side alive, which is Christ going down into death and coming back out through it. The moral fitted the mongoose so neatly that illuminators stopped worrying much about which animal they were drawing. Leonardo, sketching notes for a bestiary of his own around the 1490s, was still recording the mud coats: three or four layers, dried one after the other, until the creature wears a coat of mail.

Long before any of that, Egypt had made it holy. Herodotus, walking through the country in the fifth century BCE, noted that when ichneumons died they were embalmed and buried in sacred tombs in their own cities, exactly as dogs were. The bronze evidence is stranger still. Statuettes of Wadjet, the cobra goddess of Buto, were hollow, and inside them archaeologists have found the mummified bodies of ichneumons, folded into the body of the goddess whose other form was the snake. The cobra’s most efficient killer had become the cobra’s avatar. Egyptian religion did that kind of thing on purpose, taking a hostile force and turning it into a protective one, and the ichneumon was a natural candidate: bright-eyed, active in daylight, paired in the temple imagery against the near-blind shrew of Horus of Letopolis as day is paired against night. Some of the reliquaries were shaped as obelisks, which made the animal inside them Osiris. On a mosaic floor in the Casa del Fauno at Pompeii, an ichneumon and a cobra face each other across an Egyptianizing border, still braced, centuries after anyone in Italy had seen either one alive.

Its powers all follow from the same modest source. It is small, and being small is the point: it can get inside the thing that is trying to eat it. It can make armour out of the riverbank, which means it can arm itself anywhere in Egypt. It can be struck repeatedly and take no harm, because the venom lands in clay. It can find what it hunts by scent. And it can eat its way out of a body from the inside, which no amount of scale or bulk protects against.

Its limits follow just as directly. The armour is mud, and mud is only proof against a strike, not against weight or teeth. Nothing in any account describes the ichneumon winning a fight it did not first prepare for, and against the crocodile it wins only by patience, only while the enemy is asleep with its mouth open, only by taking the appalling risk of climbing into it. Against a waking crocodile it is a small animal beside a large one. And it was never safe from people either. Nemesianus, writing a poem on hunting, sends his hunters into the reeds along the riverbanks after it, which is the last honest note in the whole tradition: an animal the priests entombed in gold-coloured bronze in one town was, in the next, something you flushed out of the rushes with dogs.

Frequently Asked Questions

What is the ichneumon?

The ichneumon is a legendary beast of Egyptian, Greco-Roman and medieval lore, based on the real Egyptian mongoose (Herpestes ichneumon). Ancient writers described it coating itself in layers of Nile mud, letting them bake hard in the sun, and then attacking asps, crocodiles and dragons in this improvised armour. Its Greek name means “the tracker.”

How does the ichneumon kill a crocodile?

According to Strabo and Pliny the Elder, the ichneumon waits until a crocodile is basking in the sun with its jaws open, then throws itself into the open mouth, eats through the animal’s entrails and belly, and emerges from the dead body. Pliny adds that it strikes while the crocodile has been lulled to sleep by the small birds that clean its teeth. The real mongoose does nothing of the kind.

Why did the ancient Egyptians consider the ichneumon sacred?

The Egyptians honoured the ichneumon as a killer of cobras and vipers, and Herodotus recorded that dead ichneumons were embalmed and buried in sacred tombs in their own cities, as dogs were. Hollow bronze statuettes of the cobra goddess Wadjet have been found containing mummified ichneumons, making the snake’s deadliest enemy into one of the snake goddess’s own forms. The animal was also linked to the sun and to daylight, and paired against the near-blind shrew of Horus of Letopolis.

What is the ichneumon’s connection to the dragon?

In medieval bestiaries the ichneumon’s enemy was upgraded from the asp to the dragon. Seeing a dragon, the ichneumon covers itself in mud, closes its nostrils with its own tail, and attacks. Its Nile counterpart, the hydrus, performs the related trick of being swallowed whole and eating its way out, which Christian writers read as an image of Christ descending into death and returning through it.

Is the ichneumon a real animal?

The animal is real; the legend is not. The Egyptian mongoose genuinely hunts snakes and raids crocodile nests, but it does not build mud armour, plug its nose with its tail, or climb into a crocodile’s throat. Those details come from ancient natural history, chiefly Pliny and Strabo, and were repeated with increasing confidence for the next fifteen hundred years.