Not an academic paper, but this is a good summary of the history: https://www.alberta.ca/history-of-rat-control-in-alberta.aspx https://www.alberta.ca/history-o

Not an academic paper, but this is a good summary of the history: https://www.alberta.ca/history-of-rat-control-in-alberta.aspx https://www.alberta.ca/history-of-rat-control-in-alberta.asp... The wikipedia article is good too: https://en.wikipedia.org/wiki/Brown_rat#Alberta https://en.wikipedia.org/wiki/Brown_rat#Alberta One big thing is that it is too cold in Alberta for most rats to survive. The only one that's very viable is the Norway rat, and even then it's too cold for them to live outside all year round - so if you can keep them out of structures you can eliminate them entirely. Once the initial kill-off was done (which was accomplished with ludicrous amounts of poison), it's mostly about protecting the provincial border. Here's a more academic rendition: https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1031&context=vpc18 https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1... People there take it seriously. One town formed a posse when they found an infestation and killed them with brooms and sticks: https://www.cbc.ca/news/canada/neighbourhood-posse-stomps-out-rats-in-alberta-1.474371 https://www.cbc.ca/news/canada/neighbourhood-posse-stomps-ou... Fun article about a Wikipedia revision war about the territory of the brown rat: https://crackmacs.ca/lifestyle/rats-in-alberta/ https://crackmacs.ca/lifestyle/rats-in-alberta/ That article is two years old. The revision war is ongoing today: https://commons.wikimedia.org/wiki/File:Brown_rat_distribution.png https://commons.wikimedia.org/wiki/File:Brown_rat_distributi...