The Neck — Nykur of Icelandic Streams

Þórsmörk, South Iceland

The Nykur is Iceland's horse-shaped water spirit, found in glacial rivers and mountain streams. Unlike the Scottish kelpie, it is grey, has its hooves turned backwards, and leaves no prints in the direction it is travelling.

The Nykur — from the Old Norse nykr — is closely related to the Scottish kelpie and the Scandinavian neck, all water-horse spirits that lure riders to watery deaths. The Icelandic version has specific characteristics that distinguish it from its relatives. The Nykur is grey — grey as driftwood, or grey as glacial water — and has its hooves turned backwards. This reversed hoof print is the primary diagnostic: a horse's tracks that lead toward the water but whose toe-marks point away from it. The Nykur is thus moving in the opposite direction from what its tracks suggest. Þórsmörk — the valley between Mýrdalsjökull and Eyjafjallajökull glaciers — has a dense tradition of Nykur encounters, associated with the glacial rivers that make the valley difficult to cross. The rivers here are genuinely dangerous: fast, grey with glacial silt, running over unstable gravel beds. The Nykur is perhaps a natural warning given form. The encounter pattern matches the kelpie: a fine horse, already saddled, standing at a river crossing. Riders who mount it find their hands adhering to the mane. The single diagnostic warning — reversed tracks — is only visible after the fact. The one weak point: call the Nykur by its name. If you can identify it and name it aloud before touching it, it loses its power. It will stand still, then slip into the water. This detail is consistent across multiple Icelandic sources.