How so? Alberta’s climate is getting less harsh but it was never the reason that rats weren’t present. There are much more hostile environments in Canada that have rats.
I also think that Alberta was never truly rat free. I know people who have seen them in Calgary before. There is just no way that they magically disappear at the BC border for instance. Rats crawl into people’s vehicles and then those vehicles go back to Alberta.
How so? Alberta’s climate is getting less harsh but it was never the reason that rats weren’t present. There are much more hostile environments in Canada that have rats.
I also think that Alberta was never truly rat free. I know people who have seen them in Calgary before. There is just no way that they magically disappear at the BC border for instance. Rats crawl into people’s vehicles and then those vehicles go back to Alberta.
There are supposed to be no breeding rat population. People see lots of other things and think they are rats.
The rat hotline publishes stats: https://www.alberta.ca/rat-control-program-statistics
Effectively no rats but they do pop up.
Lots of people mistake muskrats as rats, that’s true