Sianach
In Scotland, the Sianach is a giant deer that hunts humans in the mountains. This may be a faint memory of the prehistoric giant Irish elk that ranged across Europe until its extinction around 9,500 BC, which had an impressive spread of antlers spanning up to 12ft across.
John and Caitlin Matthews, The Element Encyclopaedia of Magical Creatures, 2013, Sianach, p 422
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