The cited sources do not supply an origin narrative for the Biasd Bheulach. What is attested in the available material is only the being's name and its association with Odal Pass on the Isle of Skye; it is presented as one of many named Scottish supernatural beings in modern compilations of folk creatures rather than within a fuller origin myth or genealogy (Wikipedia entry; archived video list).
No physical description is provided in the cited sources. The entries list the Biasd Bheulach by name and locational association only; the sources do not record appearance, size, coloration, anthropomorphic features, or any other visual attributes.
The sources characterize the entity succinctly as a 'monster or spirit that haunts Odal Pass' but do not elaborate on specific abilities, methods of harm, speech, or interactions with travellers. Beyond its identification as a place‑haunting uncanny being, the material supplies no documented behaviors or powers.

Nuckelavee
The most terrifying creature of Orcadian folklore — a skinless, horse-headed demon of the sea whose breath spreads plague and whose presence causes crops to wither. It cannot cross fresh water.

Kelpie
A Scottish shape-shifting water horse that appears as a beautiful tame horse near lochs and rivers, then drowns and devours any rider foolish enough to mount it.

Each-Uisge
The most dangerous water horse in Scottish Highland folklore — haunting sea-lochs and mountain lakes, more violent than the river kelpie, known for consuming its victims whole.

Bean-nighe
A female spirit in Scottish Gaelic folklore who haunts desolate streams and fords, washing the clothing of those who are about to die; regarded as an omen of death and a messenger from the Otherworld.

Selkie
A seal-being from northern Atlantic coastal folklore said to shift between seal and human forms by removing or donning a seal skin. Tales focus on intimate relations with humans, the selkie's longing for the sea, and the narrative motif of a hidden skin that prevents return to the ocean.

Ghoul
A ghoul is a demon-like or monstrous humanoid originating in pre-Islamic Arabian religion, traditionally associated with graveyards and the consumption of human flesh. The concept later entered broader folklore and has been widely reused and transformed in modern fiction and popular culture.

Will-o'-the-wisp
An atmospheric 'ghost light' — a small, mobile, lamp-like light seen at night over marshes, bogs, wet ground, or graveyards. In many cultures the phenomenon is interpreted as a supernatural being or manifestation (wandering nature-spirit, soul of the dead, transformed witch, or treasure-indicator); modern science offers chemiluminescent explanations for some occurrences.
Abandinus
Abandinus is a locally attested Romano‑Celtic theonym known from a single inscribed bronze feather (votive object) dedicated at Godmanchester (the Roman fort Durovigutum) in Cambridgeshire. Scholars interpret him as a local god or male spirit tied to a specific place and possibly associated with a nearby spring or stream; this association is tentative and based on etymological readings of the name.
Abarta (Ábartach)
Abarta (also Ábartach) is a figure of Irish myth who, in surviving accounts, tricks Fionn mac Cumhaill's warriors by giving them a supernatural grey horse that bears them into the Otherworld. Sources variably identify him as a member of the Tuatha Dé Danann or as a Fomorian; after the incident he is compelled to release the captured warriors and is refused entry to the Fianna.
Abcán (Abhcán)
Abcán (modern spelling Abhcán) is a named dwarf poet and musician of the Tuatha Dé Danann in Irish myth. He appears in a small number of narratives as a musician whose art has soporific power and as the ferryman who brings the goddess Ruad from the Otherworld to the human world.
Abhean
Abhean is a named poet of the Tuatha Dé Danann in medieval Irish literature, described as a poet in particular of Lugh and recorded as having been killed by Óengus before Midir in a poem by Fland Mainistreach preserved in the Lebor Gabála Érenn.
Abnoba
Abnoba is a Gaulish theonym and toponym attested in Roman-era sources and inscriptions: a localized deity associated with woods, springs and the sources of rivers (notably the Danube) and simultaneously the name applied to a mountain or mountain range in the Black Forest/Baar/Odenwald region. Roman altars equate her with Diana, reflecting syncretic cult practice in frontier provinces.
Accolon
Accolon is a mortal knight of the Arthurian court, presented in the Post-Vulgate Merlin tradition and Malory's Le Morte d'Arthur as Morgan le Fay's paramour and instrument in a plot to supplant King Arthur; his tale centers on enchanted weapons (Excalibur and its scabbard), love-manipulation, and a tragic duel with Arthur.
Achall
Achall is an eponymous mortal woman in the Ulster Cycle of early Irish literature whose grief-induced death is given as the origin of the hill-name Achall (identified with the modern Hill of Skryne). She appears as a genealogical and etiological figure tied to Tara and later legendary events at the hill, rather than as a recurring supernatural agent.
Achtland
Achtland is a figure from Irish tradition who, according to the surviving account, was a mortal woman famed for rejecting mortal suitors who married a member of the Tuatha Dé Danann and crossed into the síde to become immortal as his wife.
Adar Llwch Gwin
Legendary large, intelligent birds from Welsh tradition said to understand human speech and obey their master's commands; best known for tearing their master Drudwas ap Tryffin to pieces when bound by a literal order in an Arthurian battle narrative. The term later came to be applied to raptors and metaphorically to brave men in medieval Welsh poetry.
Adar Rhiannon
Adar Rhiannon ('birds of Rhiannon') are a set of three magical birds in medieval Welsh narrative (the Mabinogi) whose song can 'wake the dead and lull the living to sleep.' They appear as otherworldly song‑beings tied to the figure Rhiannon and function within tales as providers of enchanted music that sustains and consoles characters.
Aderyn y Corff
Aderyn y Corff (literally 'bird of the corpse') is a bird-like death-porter in Welsh folklore said to call outside the door of a person about to die. Described as an avian portent that may lack feathers or wings and as existing on another plane when not manifesting, it is treated in Welsh ghost lore and sometimes naturalized as a screech owl in modern accounts.
Adhene
A class of Manx fairies (Cloan ny moyrn) described in Isle of Man tradition as a social people of beings said to be "fallen angels cast from heaven but too good for hell," who interact with human livelihoods and families, sometimes benevolent but often mischievous.
Community Record
- [1]Biast Bhealach Odail. Wikipedia, entry 'Biast Bhealach Odail' — 'In Scottish folklore the Biast Bhealach Odail is a monster or spirit that haunts Odal Pass on the Isle of Skye in Scotland.'wiki
- [2]25 Creatures in Scottish Folklore and Myth (video list item). Archive.org upload of a video list including 'Biasd Bheulach' as item 20 in a compilation of named Scottish folkloric creatures; used as evidence of modern cataloguing of the name among Scottish folk beings.other
