Water bull: folklore from the United Kingdom

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A water bull is a creature of Scottish Gaelic storytelling, a bull said to live in moorland lochs, able to take human or animal shape, and known for breeding with ordinary farm cattle. Tales of it were told in the Highlands and islands, and the belief was still alive there in the last decades of the 1800s.

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In the lochs and moorland pools of Scotland, people once told of a bull that could live under water, walk on land and wear a human face. They called it the water bull, or tarbh-uisge in Scottish Gaelic. It was cousin to the water horse and, unlike that beast, it was often gentle and sometimes helpful. The stories are part of Gaelic oral tradition in the Highlands and islands.

What it is

A water bull is one of the creatures of Gaelic water lore, a bull that belongs to moorland lochs rather than to fields. It can swim and it can walk on dry ground, and it can put on another shape, including a human one. The old tales say it usually keeps to the night. Like the water horse, it is amphibious and a shapeshifter, but it is kinder by nature and may help a person instead of harming one. It can still be a black and fearsome beast, most of all when people speak of the tarbh-uisge. Almost every story concerns a male; now and then a water cow appears, as in the Skye tale of one living in a small loch.

Ears and calves

The strangest part of the belief concerns calves. A water bull is said to mate with ordinary cows, and the young are known by their ears, which are small, or only half there, or look as if they had been cut. John Gregorson Campbell, a Tiree minister who collected folklore, described them as knife-eared. The bulls themselves have no ears. Water cows living near Leverburgh were said to leave calves with malformed ears of crimson or purple. What to do with such a calf divided opinion. Some thought it would bring ruin on the herd and should be destroyed at birth. In the far north, by contrast, these hybrids were prized above ordinary pedigree cattle.

The Islay story

John F. Campbell recorded a tale from Islay. A cow bore a calf, and an old woman, thought to be a witch, told the herdsman to keep it apart from the herd: she had seen its ears. He was to rear it on milk from three cows and keep it in a stable seven years. Years later a girl herding cattle by a loch met a handsome man. As he slept, his head in her lap, she found seaweed in his hair and knew him for a water horse. She fled; he took horse shape and gave chase. The witch called for the bull to be freed. The two fought until they fell into the sea. The horse never came back; the bull's remains were found the next day.

Catching and silver

Hunting a water bull was rare, because it was not usually taken for a danger. Those who wanted it dead had few options. A musket loaded with silver sixpence coins was one of them, since silver was the only thing that could kill the creature. Drowning was useless: it cannot be killed that way. In 1819 the geologist John MacCulloch described people near Loch Awe and Loch Rannoch who tied a sheep to an oak tree as bait. The tackle was not strong enough and the beast escaped. James MacKillop, a scholar of Celtic mythology, notes the old instruction that such calves should be killed at birth, by any means except water.

Name and old roots

The Gaelic name is tarbh-uisge. Edward Dwelly, a lexicographer of Scottish Gaelic, translated it as water bull, sea bull or cow, and marked the word as fabulous. Tarbh is the Gaelic word for a bull; Manx has tarroo and Welsh tarw. Uisge means water, river or stream. Where the stories came from is uncertain. The bull held a sacred place in several Celtic cults, where it stood for fertility and plenty, and one tribe, the Taurini, took its name. How a bull came to be tied to lakes is not known. The historian and symbologist Charles Milton Smith suggested that waterspouts moving over Scottish lochs might have looked like a living shape.

How Water bull is kept

There is no ceremony attached to the water bull. The custom is a body of story, and it was kept by telling. Crofters and herdsmen in the Gaelic-speaking parts of Scotland passed the tales on by word of mouth, and ministers and folklorists wrote them down. The belief also shaped what people did with a strange calf. A herdsman who suspected that a calf had water blood might separate it from the herd, feed it on milk from three different cows and keep it in a stable for years. Some did that to protect the herd; others did it to raise a better animal.

When and where

The water bull has no day or season of its own. Stories about it were told at any time of year, and they belong to particular lochs rather than to dates. Belief in the creature lasted in Scotland into the closing decades of the 1800s, at least.

Scotland is its home, above all the Highlands and the islands, where stories place it in small lochs on Skye and Islay and around Leverburgh, and near Loch Awe and Loch Rannoch on the mainland. A comparable beast, the tarroo ushtey, is known on the Isle of Man, where it is more often said to live in marshland. Irish tradition has the tarbh-uisce.

What Water bull means

To the people who told these stories, a bull stood for strength and increase. The Celts looked on the animal as a sign of fertility and plenty, and one tribe took its name, the Taurini. A water bull could be a helper as easily as a danger. It was also a warning about the herd: a calf with odd ears might be the sign of a hidden parent, and a farmer had to decide whether that meant ruin or a finer animal than any pedigree stock.

Questions people ask about Water bull

What is a water bull?

It is a creature from Scottish Gaelic storytelling, a bull that lives in moorland lochs and can change shape. People described it as a cousin of the water horse. Sometimes it is a black monster, sometimes a helpful beast. It appears most often in stories from the Highlands and the islands.

Where is the water bull known?

Its home is Scotland, especially the Highlands and the islands. Tales place it in small lochs on Skye and Islay and near Leverburgh, and by Loch Awe and Loch Rannoch. The Isle of Man has a related creature, the tarroo ushtey. Irish lore has the tarbh-uisce, and Welsh calls a bull tarw.

Did people ever try to kill one?

Rarely. The water bull was not usually seen as a threat. A farmer and his sons loaded a musket with silver sixpence coins, as silver alone could kill the beast, and drowning could not. In 1819 the geologist John MacCulloch described people near Loch Awe and Loch Rannoch baiting one with a sheep tied to an oak, but the tackle broke.

What happens if a water bull mates with a cow?

The calves are said to live, and you can tell them apart by their ears, which are small or half formed. On the Isle of Man the story is darker: the cow itself dies, leaving a shapeless lump of flesh and skin without bones. In parts of the far north of Scotland such calves were thought better than ordinary pedigree cattle.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Water bull", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryParampara rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.

It may contain mistakes. Traditions differ from one family, village and community to the next, and the people who keep them know them best. If something is wrong, tell us. Last refreshed 2026-10-11.

Water bull