No fairy is more feared in Ireland than the pooka. This may be because it is always out and about after nightfall, creating harm and mischief, and because it can assume a variety of terrifying forms. The guise in which it most often appears, however, is that of a sleek, dark horse with sulphurous yellow eyes and a long wild mane. In this form, it roams large areas of countryside at night, tearing down fences and gates, scattering livestock in terror, trampling crops and generally doing damage around remote farms.
In remote areas of County Down, the pooka becomes a small, deformed goblin who demands a share of the crop at the end of the harvest: for this reason several strands, known as the 'pooka's share', are left behind by the reapers. In parts of County Laois, the pooka becomes a huge, hairy bogeyman who terrifies those abroad at night; in Waterford and Wexford, it appears as an eagle with a massive wingspan; and in Roscommon, as a black goat with curling horns. The mere sight of it may prevent hens laying their eggs or cows giving milk, and it is the curse of all late night travellers as it is known to swoop them up on to its back and then throw them into muddy ditches or bogholes.
The pooka has the power of human speech, and it has been known to stop in front of certain houses and call out the names of those it wants to take upon its midnight dashes. If that person refuses, the pooka will vandalise their property because it is a very vindictive fairy. The origins of the pooka are to some extent speculative. The name may come from the Scandinavian pook or puke, meaning 'nature spirit'. Such beings were very capricious and had to be continually placated or they would create havoc in the countryside, destroying crops and causing illness among livestock. Alternatively, the horse cults prevalent throughout the early Celtic world may have provided the underlying motif for the nightmare steed. Other authorities suggest that the name comes from the early Irish poc meaning either 'a male goat' or a 'blow from a cudgel'. However, the horse cult origin is perhaps the most plausible since many of these cults met on high ground and the main abode of the pooka is believed to be on high mountain tops.
There is a waterfall formed by the river Liffey in the Wicklow mountains known as the Poula Phouk (the pooka's hole), and Binlaughlin Mountain in County Fermanagh is also known as the 'peak of the speaking horse'. In some areas of the country, the pooka is rather more mysterious than dangerous, provided it is treated with proper respect. The pooka may even be helpful on occasion, issuing prophecies and warnings where appropriate. For example, the folklorist Douglas Hyde referred to a 'plump, sleek, terrible steed' which emerged from a hill in Leinster and which spoke in a human voice to the people there on the first day of November. It was accustomed to give "intelligent and proper answers to those who consulted it concerning all that would befall them until November the next year. And the people used to leave gifts and presents at the hill…"
Something similar seems to have occurred in south Fermanagh, where the tradition of gathering on certain high places to await a speaking horse was observed on Bilberry Sunday until quite recently.
Only one man has ever managed to ride the pooka and that was Brian Boru, the High King of Ireland. Using a special bridle containing three hairs from the pooka's tail, Brian managed to control the magic horse and stay on its back until, exhausted, it surrendered to his will.