The Unkindness of Ravens were inspired by figures from Norse and Celtic mythology such as the Valkyries and The Morrígan. Filming took place during 2014 in Fife, Edinburgh, and Perthshire, and moved into post-production in 2015. To help with costs, Brewster opened a crowdfunding campaign through Kickstarter, with the goal to raise £40,000. The campaign was successful and marked the first Scottish crowdfunding campaign to raise such a large amount of money and the highest funded British horror film on Kickstarter. Horror film critic Kim Newman reviewed "The Unkindness of Ravens", writing that it was "a demanding, complicated film which might well require repeat
Rolling and wheeled creatures in fiction and legend quickly on open terrain, the Wheelers are stymied by obstacles in their path that do not hinder creatures with limbs. They also make an appearance in the 1985 film "Return to Oz", based partly on "Ozma of Oz". The 1968 novel "The Goblin Reservation" by Clifford D. Simak features an intelligent alien race that uses biological wheels. "Chorlton and the Wheelies", a British stop-motion-animated television series that aired from 1976 to 1979, was set in "Wheelie World", which was inhabited by three-wheeled creatures called "wheelies". Piers Anthony's 1977 book "Cluster" and its sequels feature aliens called Polarians, which locomote by