There are definitely more rabbits in Calgary now than there used to be. The rabbits are not a native species. They are feral European rabbits that used to be pets. Every year their population grows. It's happening in lots of places in North America. Specifically, Calgary over the last few years:
https://www.cbc.ca/news/canada/calga...gary-1.5246433
When I was growing up in the SE we'd have lots of wild hares from Fish Creek Park wander into our neighbourhood. They were much more skittish and would actively hide from people. These rabbits just seem to hang around.