In the folklore of Cambridgeshire, the Shug Monkey is a creature that shares features of a dog and monkey, which reportedly haunted Slough Hill Lane (a street that leads from the village of West Wratting to nearby Balsham). The creature, said to have the body of a jet-black shaggy sheepdog and the face of a monkey with staring eyes, was believed to be a supernatural ghost or demon. Local writer and broadcaster James Wentworth Day, who first related stories of the Shug Monkey in Here Are Ghosts and Witches (1954), described it as a curious variation of Black Shuck, while local folklorist Polly Howat suggests that both share common origins in Norse mythology.
Local Police Constable A. Taylor, who heard the stories of the creature in his youth, described it to Wentworth Day as: "a cross between a big rough-coated dog and a monkey with big shining eyes. Sometimes it would shuffle along on its hind legs and at other times it would whiz past on all fours." He also stated that after dark local children at that time avoided its haunt on Slough Hill, which was then an overgrown and little-used lane.
- Nick Redfern (2004). Three Men Seeking Monsters: Six Weeks in Pursuit of Werewolves, Lake Monsters, Giant Cats, Ghostly Devil Dogs, and Ape-Men (Chapter 16: "The Final Countdown"). Paraview Pocket Books. pp. 227–43. ISBN 0-7434-8254-9.
- Nick Redfern (2007). Man-Monkey: In search of the British Bigfoot. CFZ Press. pp. 227–43. ISBN 978-1-905723-16-4.
- Wentworth Day, James (1954), Here Are Ghosts and Witches, B.T. Batsford
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- Howat, Polly (1990), Tales of Old Cambridgeshire, Countryside Books, ISBN 9781853060861