
Celtic Mythological Creatures
Water horses, death omens, fairy beings, shapeshifters, spectral hounds, and several excellent reasons not to follow singing into the mist.
Celtic folklore is full of creatures that live at the edges.
The edge of the water.
The edge of the road.
The edge of the forest.
The edge of death.
The edge of the human world and whatever waits just beyond it.
These are not always monsters in the simple sense. Some are omens. Some are spirits. Some are fairy beings. Some are shapeshifters. Some guard, lure, warn, punish, trick, mourn, or appear only when something has already gone wrong.
A horse by the loch may not be a horse.
A woman singing at night may not be human.
A black hound on the road may not be lost.
A rider without a head is unlikely to be asking for directions.
This guide explores Celtic mythological creatures from Irish, Scottish, Welsh, Manx, Cornish, and broader Celtic tradition, including the Banshee, Kelpie, Selkie, Dullahan, Cu Sith, Púca, fairy beings, spectral hounds, and other figures that make wandering into the mist feel less romantic and more administratively final.
Study carefully. In Celtic folklore, the boundary is rarely marked. That is usually the problem.

