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
Fierce Creatures the movie. On Rotten Tomatoes, the film has a score of 53% based on 32 reviews with an average rating of 5.6/10. The site's critical consensus reads ""Fierce Creatures" reunites "A Fish Called Wanda"'s talented ensemble for a comedy that, while not without its moments, suffers from diminishing returns". Roger Ebert awarded the film two and a half out of four stars, and compared it unfavourably to "A Fish Called Wanda", stating: "It lacks the hair-trigger timing, the headlong rush into comic illogic, that made "Wanda" so special." Cleese has since stated that following up "A Fish Called Wanda" with