Snakes in the wall

 https://www.washingtonpost.com/nation/2023/05/10/garter-snakes-woman-colorado-house/

One of the worst household pests, indeed.

https://www.denver7.com/news/front-range/centennial/centennial-homebuyer-finds-snakes-in-the-walls-just-over-a-month-after-closing

https://people.com/human-interest/colorado-woman-finds-shockingly-big-snakes-walls-new-home/

https://www.usatoday.com/story/news/nation/2023/05/08/colorado-snakes-infesting-home/70194695007 Beware of the toilet snake.

https://thedigitallabyrinth.blogspot.com/search?q=toilet+snake