Cat-sìth
fictional cats and other felines

The cat-sìth (Scottish Gaelic: [kʰaʰt̪ ˈʃiː], plural cait-shìth), in Irish cat sí (Irish: [kat̪ˠ ˈʃiː]), is a fairy creature from Celtic mythology, said to resemble a large black cat with a white spot on its chest that walks on its hind legs. Legend has it that the spectral cat haunts the Scottish Highlands. The legends surrounding this creature are more common in Scottish folklore, but a few occur in Irish. Some common folklore suggested that the cat-sìth was not a fairy, but a witch that could transform into a cat nine times.
The cat-sìth may have been inspired by the Scottish wildcat itself. Furthermore, it is also possible that the legends of the cat-sìth were inspired by Kellas cats, which are a distinctive hybrid between Scottish wildcats and domestic cats found only in Scotland.
Appearance
The cat-sìth is all black with the exception of a white spot on its chest. It is described as being as large as a dog and chooses to display itself with its back arched and bristles erect. When the cat-sìth thinks no humans are watching, it walks on its hind legs, which is how many stories of a cat-sìth being discovered happen. Around humans, the cat-sìth will try and appear bigger by arching its back and making its fur stand on end as a way to show dominance.
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This entry incorporates text from “Cat-sìth” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.